22 Women Geneticists Who Should be Famous!
But aren’t because they weren’t men

Have you ever heard about Nettie Stevens? Or Helen Redfield? Or Esther Lederberg and host of others? Probably not.
And why is that?
Because they are women scientists.
Very few women are mentioned and given the same status, even though the work they did was just as important, if not more so. The only female geneticist I remember being mentioned in my college genetic textbooks was Barbara McClintock.
That’s just not right.
So in 2020, the 100th anniversary of women obtaining the right to vote in the United States, I’d like to introduce you to and commemorate 22 remarkable women geneticists who are no longer with us.
In my Buddhist practice, we pay homage to all the dharma ancestors that have transmitted their realization to their successors and again, although there are many women who should have been noted, only the male teachers are named. So in our modern age, we do the best we can to acknowledge these women dharma teachers by adding,
“and we pay homage to all our women ancestors, known and unknown, whose shining practice guides us to this day”
So let’s cast a light on these stellar women geneticists whose shining research guided us and so many others into this new day.
Female Geneticists — The best of the best
I have arranged them according to their birthdates, from earliest to most recent.

1. Nettie Maria Stevens,
(born July 7, 1861, Cavendish, Vermont, U.S. — died May 4, 1912, Baltimore, Maryland), was an American biologist and geneticist and was one of the first scientists to discover that a certain combination of chromosomes determined the sex of an organism.
One smart cookie, Stevens finished her 4 years of high school in two!
She entered Stanford University in 1896 and received her M.A in 1900. She pursued doctoral studies in biology at Bryn Mawr College and was awarded her Ph.D. in 1903. She never left Bryn Mawr and was an associate in experimental morphology from 1905 until her death.
Stevens’s first published paper detailed the morphology and taxonomy of a ciliate protozoan. She then became interested in looking at the biology of cells (cytology) and how they repair themselves. One of her major papers in that field was written in 1904 with zoologist and geneticist Thomas Hunt Morgan, who in 1933 would win the Nobel Prize for his work.
Her regeneration work led her to look at how embryos form all the different tissues and determine what sex they will become. This led her to start studying chromosomes.
In 1905, after using the yellow mealworm (Tenebrio molitor) as her experimental model, she discovered that a particular combination of 2 chromosomes, the X and the Y chromosomes, determined which sex an individual would become.
Not only was this the first proof that sex was determined by heredity, but it also debunked the theory that sex was determined by some unknown embryonic environmental influence.
It also was the first firm link between a heritable characteristic and a particular chromosome.
In subsequent research on chromosomes, Stevens discovered supernumerary chromosomes in certain insects and the paired state of chromosomes in flies and mosquitoes.
She died at the age of 50 from breast cancer.
Even though her career span was short she published approximately 40 papers!

2. Edith Rebecca Saunders,
(born Oct. 14, 1865, Brighton, Eng. — died June 6, 1945, Cambridge)
Described by J. B. S. Haldane as the “Mother of British Plant Genetics”, she played an active role in the re-discovery of Mendel’s laws of heredity, the understanding of trait inheritance in plants, and was the first collaborator of the geneticist William Bateson.
Saunders’ earlier research focused on genetics. Many of her experiments led to her and Bateson defining important terms like “allelomorphs” (nowadays referred to as alleles), heterozygote and homozygote.
Saunders was also the first person to collaborate with Bateson. In the 5 years spanning 1897 to 1902, they published a series of papers on the inheritance of dominant and recessive traits in the plant Biscutella laevigata, a member of the mustard family.
In a collaboration between her, Bateson and Reginald Punnett, they co-discovered genetic linkage.
As a result of her acclaimed work with Bateson and the Balfour laboratory she was elected a fellow of the prestigious Linnean Society and became one of its first female members. She served on the society’s council and as its vice president. She also was designated president of the botanical section of the British Association for the Advancement of Science (now the British Science Association) and of the Genetical Society (now the Genetics Society).
Saunders was particularly interested in the anatomy of female plant reproductive structures and published several articles on the subject (see her series of articles on “Illustrations of Carpel Polymorphism” published in the journal New Phytologist between 1928 and 1931).
She also published a two-volume reference, Floral Morphology (1937–1939) in which she discussed the conservation of floral structures and how they illustrated evolutionary relationships.
Saunders’ work opened up important new avenues of research that geneticists and botanists still continue to explore and gain new insights.
3. (Edavalath Kakkat) E. K. Janaki Ammal
(born November 04, 1897, Tellicherry, Madras Presidency, British India. — died February 07, 1984, Madras, Tamil Nadu.)
India’s first female botanist, Ammal developed several hybrid species still grown today. She also advocated for protecting the biodiversity of India.
Her most notable work involved studies on sugarcane and the eggplant (brinjal) but she also worked on the cytogenetics of a range of plants and co-authored the Chromosome Atlas of Cultivated Plants (1945) with C.D. Darlington.
Ammal obtained an honours degree in Botany from the Presidency College and in 1926, a M.Sc. degree from the University of Michigan. she went back to India for a few years and then returned to the U of Michigan as an Oriental Barbour Fellow, obtaining her Ph.D. in 1931.
In 1939 she travelled to Edinburgh to attend the International Congress of Genetics conference and was forced to remain due to World War II. For 6 years she stayed at the John Innes Centre as an assistant cytologist to C.D. Darlington where they published the atlas.
The Kerala-born Ammal was arguably the first woman to obtain a Ph.D. in botany in the U.S. (1931) and remains one of the few Asian women to be conferred a D.Sc. (honoris causa) by her alma mater, the University of Michigan. Her memory is preserved in the delicate white magnolias named after her, and a newly developed, yellow-petaled rose hybrid that now blooms in her name.

Ammal also pioneered both indigenous and gendered environmental approaches to land use. In 1955 she was the only woman to attend an international symposium entitled Man’s Role in Changing the Face of the Earth. The only woman scientist present, she spoke to a room full of mostly white Caucasian males about India’s subsistence economy, the significance of tribal cultures and their cultivation of native plants, and the importance of Indian matrilineal traditions that valued women as managers of property, including a family’s plants.
In her later years, she became a spokesperson for a conservation organization in India called Save Silent Valley, a campaign to stop a hydroelectric project that would flood the Silent Valley forests. She wrote to Darlington,
“I am about to start a daring feat. I have made up my mind to take a chromosome survey of the forest trees of the Silent Valley which is about to be made into a lake by letting in the waters of the river Kunthi.”
She was ultimately successful, the project was abandoned and on the 15th of November, 1984 the forest was granted National Park status. Unfortunately, she had already passed away 9 months earlier.
Remembering her aunt, Geeta Doctor wrote that Ammal never liked to talk about herself. Rather, Ammal believed that “My work is what will survive.”
She was awarded a Padma Shri by the Indian government in 1977.
Ammal’s work does not just survive, it thrives.

4. Charlotte Auerbach
(born May 14, 1899, Krefeld am Rhein, Ger. — died March 17, 1994, Edinburgh, Scot.)
In addition to being female, Auerbach (affectionately known to friends the world over as “Lotte”) was also Jewish. A double whammy! Under the Nazi regime of the 1930s, she suffered Anti-Semitism and was dismissed from her teaching post.
Auerbach left Germany in 1933, and having contacts in Britain, went to Edinburgh where she gained her Ph.D. at the Institute of Animal Genetics. She also obtained a DSc degree from Edinburgh University in 1947.
Her seminal genetic discovery actually came in 1941 when in collaboration with A. J. Clark and J. M. Robson, Auerbach discovered that she could use mustard gas to induce genetic mutations in Drosophila (fruit flies), a common organism used to study genetics. It was finally published in 1946 and 1947.
Interesting note:
Auerbach and her colleague's experiments on mustard gas during the war were carried out on the roof of the pharmacology building. The researchers all suffered burns on their hands. Current health and safety legislation would not have allowed these experiments without stringent controls!As a result of her mustard gas studies, in 1948 Lotte was awarded the Keith Prize of the Royal Society of Edinburgh.
In addition to her scientific work, Lotte was an avid supporter of the Committee for Nuclear Disarmament, a fierce opponent of apartheid, and a confirmed liberal.
You can read a more detailed account of her early years and studies here.

5. Helen Redfield
(born May 5, 1900, Archbold, Ohio. — died, 1988, Penn.)
Known for her work in Drosophila genetics and cancer research.
There is not a lot of information on the internet about Redfield so her section is brief.
Redfield was another very smart woman. While in college at Rice University, she discovered genetics through her Biology teachers, Herman Muller and Edgar Altenburg, two well-known geneticists of that time.
From Rice, she went to the University of California at Berkeley and in 1921, obtained her Ph.D. in zoology. She then joined the faculty at Stanford in 1925, eventually moving to Columbia University as a Research Fellow and working in Thomas Hunt Morgan’s famous “fly room”. Morgan’s fly room was a hotbed of Drosophila genetics.
In 1926, Redfield married another fly room geneticist, Jack Schultz, and had 2 children. She only worked sporadically after that.
In 1939 Redfield worked as a geneticist in the Kirchoff laboratory at the California Institute of Technology.
From 1951 until 1961 she served as a research associate at the Institute for Cancer Research.
6. Barbara McClintock
(born June 16, 1902, Hartford, Conn. — died September 02, 1992, Cold Spring Harbor, NY.)
Born with the name Eleanor, she changed it to Barbara because she felt that her birth name was too feminine and delicate!
McClintock received all three degrees, B.S. (1923), M.S. and Ph.D. in botany (1927) from Cornell University in Ithaca, NY. In this time period, women were not allowed to major in the study genetics at Cornell. Nonetheless, she was a member of a small group that studied corn cytogenetics.
McClintock’s early work was nothing short of revolutionary. Between 1929 and 1935, she was responsible for ten out of seventeen advancements made by Cornell scientists in the field of maize cytogenetics.
The quote above taken from the article by David Hoang (2019), Carnegie Summer Intern
She did postdoctoral studies at a variety of institutions and in 1936 accepted a position at the University of Missouri. However, believing she would never be granted tenure she left and took a one-year position at the Carnegie Institution of Washington’s Department of Genetics at Cold Spring Harbor Laboratory on Long Island, New York.
The following year, she was hired on as full-time staff at the Carnegie Institution and remained there until she retired, 26 years later. She was invited to stay on at Cold Spring Harbor and remained there as a research scientist until her death.
She continued to study maize (corn) cytogenetics and did groundbreaking work, showing how traits were suppressed or expressed between generations and how genes on chromosomes moved during breeding, that went against the common wisdom of the time. As a result of skepticism about her work, she decided to not publish it in the standard academic journals. However, she did share it with a small group of loyal colleagues.
Throughout her career, McClintock was recognized as one of the most distinguished scientists of the 20th century. In 1944 she was the third woman ever elected to the National Academy of Sciences. She was also elected into the Genetics Society of America and in 1945 became its president.
She also travelled extensively in South America to study varieties of maize that grew there which culminated in her 1981 publication of The Chromosomal Constitution of Races of Maize.
Although she received many awards, in 1983, at the age of 81, McClintock received The Nobel Prize in Physiology or Medicine for her work on mobile or transposable elements (aka jumping genes, these are genes that don’t stay in one place on the chromosome but actually “jump around” to different places).

7. Ruth Sager
(born February 7, 1918, Chicago, Ill. — died March 29, 1997, Brookline, MA.)
At the age of 16, she entered the University of Chicago and became fascinated with Biology.
“Science is a way of life. I think it all comes from the inside. It really gets to the very core of your existence. It is much like being an artist or a dancer. It’s something that demands everything from you that you are capable of.”
She received a Masters in 1944 in Physiology from Rutgers researching the growth of tomato seedlings and in 1948, a Ph.D. in maize genetics from Columbia for work performed under Marcus Rhoades, and with Barbara McClintock.
Her World War II years were spent as a secretary and an apple farmer.
Sager’s groundbreaking discovery was based on her conviction that not all genes were limited to the nucleus, but some could also be found in other organelles inside the cell.
Her theory was that these non-chromosomal genes evolved before the nuclear genes and so might more closely resemble genes found in early forms of life. Using the alga Chlamydomonas reinhardtii as a model organism, she was able to demonstrate this and was the first person to publish an extensive genetic mapping of a cellular organelle.
Sager joined As a Research Associate in the Zoology department at Columbia University. In 1961, in collaboration with Francis J. Ryan, she published a textbook entitled “Cell Heredity”, considered by some to be the first molecular biology text.
She never received a faculty position at Columbia. Her ideas were not well accepted due to skepticism in the general scientific community. There are also allusions to her experiencing gender discrimination so she left Columbia in 1966 to take on the position of a full Biology professorship at Hunter College in New York City.
In 1944 Sagar married Seymour Melman and eventually divorced him; in 1974, she married Arthur Pardee and in 1975 became one of the first-ever full-time female professors at Harvard University.
In the 1970s, Sager began researching cancer genetics as the head of the Division of Cancer Genetics at Dana-Farber Cancer Institute. In 1972, she published her second book, “Cytoplasmic Genes and Organelles”.
Sager investigated how cancer cells grow, multiply, and reduce the ability of a cell to stably maintain its chromosome structures. She also theorized that a group of genes we now call tumour suppressor genes might be the secret weapon halting the growth of cancer. She identified over 100 potential tumour suppressor genes!
In 1977 she was elected to the National Academy of Sciences and the American Academy of Arts and Sciences in 1979. In 1988 Sagar was awarded the Gilbert Morgan Smith Medal from the National Academy of Sciences.
She was a leader in the field of recombinant DNA technology, gene splicing, and cell cloning at Harvard for 22 years. Among her outstanding contributions, she devised the first cell lines and culture medium capable of culturing and comparing normal and cancer cells.
Sager succumbed to bladder cancer in 1997.
You can read even more about Sager in her National Academy of Sciences Biography.
“the way to find out something really new is to question the basic tenet of existing theory.”
Ruth Sager
8. Sylvia Dorothy Lawler nee Corben
(born January 15, 1922, Bournemouth, Eng. — died January 17, 1996.)
Lawler worked in the overlapping fields of immunology and human genetics.
She was the only child of a furniture salesman and a schoolteacher. Eventually, she studied medicine at the University College London in 1939, distinguishing herself and graduating as the gold medalist of her year in 1945!
She married Lawrence John Lawler who was a captain in the Royal Electrical and Mechanical Engineers (REME). They had one son, Anthony John born in 1955. Her marriage to Lawler was dissolved in 1976, and on 28 January 1977, she married Kenneth Dawson Bagshawe.
In 1949 she was invited to join the world’s first department for the study of human genetics at Galton Laboratory at University College, London.
In 1960 Lawler was first appointed as a research scientist, later becoming the Institute of Cancer Research’s first female professor and one of the first women geneticists in the UK.
The work that she is best known for is her studies on bone marrow transplantation performed after a cancer patient has undergone high chemotherapy doses. This treatment often destroys the patient’s bone marrow.
The work she did with her team led to the first bone marrow transplant ever done in Europe.
She accomplished this by looking at a specific protein on the surface of white blood cells that could be analyzed to determine if the donors and recipients were a compatible match.
Lawler also helped to establish the first national fetal tissue bank in the UK, with support from the Medical Research Council.
In honour of the work she performed over the course of her life, The annual Sylvia Lawler prize was created by the Royal Society of Medicine and given to the best scientific and the best clinical papers. It is a highly competitive and esteemed award in the field of oncology.
In 1963, Lawler published a book entitled Human Blood Groups and Inheritance and went on to publish many more journal articles throughout her career.

9. Esther Miriam Lederberg nee Zimmer
(born December 18, 1922, Bronx, NY. — died November 11, 2006, Stanford, CA.)
Lederberg was a microbiologist who pioneered studies into bacterial genetics.
Lederberg’s is best known for her discoveries of the lambda (λ) bacteriophage, replica plating, gene transfer by specialized transduction and the F-plasmid or bacterial fertility factor F. More about all these a bit later.
Lederberg was born into an Orthodox Jewish family. After graduating from high school, she was awarded a scholarship to study at Hunter College. She received a bachelor’s degree in genetics and graduated cum laude in 1942, at the age of 20. During her years at Hunter, she also worked as a researcher at the New York Botanical Garden studying a mould found on bread, Neurospora crassa.
In 1944 she won a fellowship to Stanford and obtained her M.Sc. in 1946. That same year, she married Joshua Lederberg, a professor at the University of Wisconsin. So she relocated to the U of Wisconsin and completed her doctoral studies in 1950 looking at genetic control of mutations in the gut bacteria, Escherichia coli.
It was at Wisconsin that Lederberg made the discoveries mentioned above. Let’s see why they are so important.
λ bacteriophage is a virus that infects the bacteria, E. coli., certain strains of which can make us very sick! You can actually see a picture of the phage in my article about viruses.
Lederberg discovered it in 1951 while doing her Ph.D. studies and published a detailed description in 1953. Unlike many other viruses, when a λ-phage virus infects the E. coli bacterial cell, it does not always replicate and destroy the cell. Depending on the conditions, the phage DNA which enters the cell may actually incorporate itself into the bacterial chromosome and be passed along to other bacterial cells when the original host cell divides.
This incorporation of viral DNA without host destruction is called lysogeny and the viral DNA is called a prophage. When the host cell is subjected to stress, the virus activates the genes it needs to replicate and destroy its host cell, spreading new viral particles to other cells to repeat the cycle.
That is how Lederberg discovered it. She subjected a strain of E. coli to radiation to mutate it and then mixed the mutated cells with other cells that had not been exposed. What she saw in a few days were areas on the culture dish where cells were being killed and contained high concentrations of the new virus which she determined was killing the bacterial cells.
Continuing to study λ-phage led to the discovery that when it reactivated itself and produced new particles, it often incorporated a small piece of the bacterial DNA from where it had inserted itself, and incorporated it into the new host when it became lysogenic. This was called specialized transduction.
Another extremely important technique she developed is called replica plating. Bacteria grow on culture dishes and form little raised colonies like those in the picture.

If you take a sterilized piece of velvet and lay it on top of the dish, cells from each of the colonies will be transferred to the velvet. If you then put the piece of velvet on top of new culture dishes (replicating) with different media that lacks or contains different substances, you can see if any of the original colonies were sensitive to the new conditions and you can go back to the original plate to pick out the colonies that failed to grow on the new plate because the original colony growth pattern was maintained. Imagine all the different things you could test! And it’s still widely used in research today.
Another big breakthrough was her discovery of the F-plasmid, which was required for bacterial fertility and recombination. Let’s avoid the technical description and just say that it was and still is critical for all future molecular genetic work in bacteria.
“Experimentally and methodologically she was a genius in the lab.” said Stanley Falkow
Lederberg “was cheery and had an excellent sense of humor, but I believe she would want to be remembered mostly as a scientist, which she was through and through until her very last days,” said Research Associate Jonathan Hardy, a friend of Lederberg’s.
The failure of the scientific community of her time makes Lederberg a classic example of The Matilda Effect. The term was coined by scientific historian Margaret Rossiter and is a nod to 19th-century suffragist Matilda J. Gage. As Rossiter puts it, she first described the bias that has led to female researchers being “ignored, denied credit or otherwise dropped from sight” throughout history.
For complete documentation of Lederberg’s life and achievements, you can peruse the Esther M. Zimmer Lederberg Memorial Website created and maintained by her second husband, Matthew Simon, whom she married in 1993.

10. Liane “Lee” Russell nee Brauch
(born August 27, 1923, Vienna, Aus. — died July 20, 2019, Oak Ridge, Tenn.)
An American geneticist and conservationist.
Quick Stats:
- 1945 A.B. from Hunter College in New York.
- 1943–1947 Research Assistant at Jackson Memorial Laboratory
- 1947 Oak Ridge National Laboratory and became a Senior Corporate Fellow and Section Head
- 1949 Doctorate in Zoology from the University of Chicago in Illinois
- 1986 Elected to National Academy of Scientists
- 1993 Received the Enrico Fermi Award
Born into the Brauch Jewish family in Vienna, she and her family were forced to leave when her father secretly surrendered his business to the Nazis and like Charlotte Auerbach, the family fled to London. They subsequently relocated to the US in 1941.
As a research assistant at the Jackson Memorial Laboratory, she met zoologist and geneticist William L. Russell who mentored her and later became her husband and research partner. Unlike many women scientists today, in all her publications she used her married name.
It was at Jackson that Russell fell in love with research and used mice as a genetic model system. The Russells moved to Oak Ridge National Laboratory and began investigating the effects of radiation on mouse embryonic development. Her findings resulted in international medical guidelines that recommended against exposing a woman with an unsuspected pregnancy to potentially harmful X-rays.
It’s why today’s doctors ask younger women if they are pregnant before they recommend they get any X-ray screening or treatment. And if they don’t know one way or the other, they advise the “14-day rule” which recommends women only undergo radiological procedures — like X-rays — during the two weeks after the onset of their last menstrual cycle, when they are least likely to be pregnant.
Their laboratory at Oak Ridge became known as the “Mouse House” and housed over 200,000 mice for use in genetic experiments!
Russell produced many strains of mutated mice and used some of them to conclusively demonstrate that in mammals, the Y-chromosome determined the animal’s male gender. The publication of this work resulted in a flurry of work by other molecular geneticists to see if this was what also happened in humans. Of course, we now know that it is true but at the time, it was a groundbreaking discovery!
She published more than 150 papers. To browse a listing of some of her more important published articles, this is an excellent resource.
In 2013, the ORNL honoured Russell by creating the Liane B. Russell Distinguished Early Career Fellowship, a three-year program that seeks to foster long-term career opportunities at the lab — particularly for minority and female scientists.
“In my life, I was very fortunate in being given opportunities to pursue my own ideas in exciting research areas,” Russell once said. “But this is, sadly, not the case for many young women hoping for scientific careers and ending up in merely supporting roles, perhaps doing only routine jobs.”
Russell served as a scientific advisor for the U.S. delegation at the first Atoms for Peace Conference held in Geneva in 1955, and in 1973 was the first woman to receive the internationally awarded Roentgen Medal.
And there was so much more. I just didn’t want to overburden you with TMI!
If you’d like to hear her talk about one facet of her work, here’s a short video she recorded that was published in Knox News 2 days after her death.
And here’s a much longer one (over an hour)



















