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Thomas Hunt Morgan was an American evolutionary biologist, geneticist, embryologist, and science author who won the Nobel Prize in Physiology or Medicine in 1933 for discoveries elucidating the role that the chromosome plays in heredity.
A sex-determination system is a biological system that determines the development of sexual characteristics in an organism. Most organisms that create their offspring using sexual reproduction have two common sexes and a few less common intersex variations.
The Y chromosome is one of two sex chromosomes in therian mammals and other organisms. Along with the X chromosome, it is part of the XY sex-determination system, in which the Y is the sex-determining chromosome because the presence of the Y chromosome causes offspring produced in sexual reproduction to be of male sex. In mammals, the Y chromosome contains the SRY gene, which triggers development of male gonads. The Y chromosome is passed only from male parents to male offspring.
In biology, gonochorism is a sexual system where there are two sexes and each individual organism is either male or female. The term gonochorism is usually applied in animal species, the vast majority of which are gonochoric.
Nettie Maria Stevens was an American geneticist who discovered sex chromosomes. In 1905, soon after the rediscovery of Mendel's paper on genetics in 1900, she observed that male mealworms produced two kinds of sperm, one with a large chromosome and one with a small chromosome. When the sperm with the large chromosome fertilized eggs, they produced female offspring, and when the sperm with the small chromosome fertilized eggs, they produced male offspring. The pair of sex chromosomes that she studied later became known as the X and Y chromosomes.
The XO sex-determination system is a system that some species of insects, arachnids, and mammals use to determine the sex of offspring. In this system, there is only one sex chromosome, referred to as X. Males only have one X chromosome (XO), while females have two (XX). The letter O signifies the lack of a Y chromosome. Maternal gametes always contain an X chromosome, so the sex of the animals' offspring depends on whether a sex chromosome is present in the male gamete. Its sperm normally contains either one X chromosome or no sex chromosomes at all.
Barbara J. Meyer is a biologist and genetist, noted for her pioneering research on lambda phage, a virus that infects bacteria; discovery of the master control gene involved in sex determination; and studies of gene regulation, particularly dosage compensation. Meyer's work has revealed mechanisms of sex determination and dosage compensation—that balance X-chromosome gene expression between the sexes in Caenorhabditis elegans that continue to serve as the foundation of diverse areas of study on chromosome structure and function today.
An organism's sex is female if it produces the ovum, the type of gamete that fuses with the male gamete during sexual reproduction.
John Charles Avise is an American evolutionary geneticist, conservationist, natural historian, and prolific science author. He is an Emeritus Distinguished Professor of Ecology & Evolution, University of California, Irvine, and was previously a Distinguished Professor of Genetics at the University of Georgia.
Sarah Perin Otto is a theoretical biologist, Canada Research Chair in Theoretical and Experimental Evolution, and is currently a Killam Professor at the University of British Columbia. From 2008-2016, she was the director of the Biodiversity Research Centre at the University of British Columbia. Otto was named a 2011 MacArthur Fellow. In 2015 the American Society of Naturalists gave her the Sewall Wright Award for fundamental contributions to the unification of biology. In 2021, she was awarded the Darwin–Wallace Medal for contributing major advances to the mathematical theory of evolution.
Jennifer Ann Marshall Graves is an Australian geneticist. She is Distinguished Professor within the La Trobe Institute for Molecular Science, La Trobe University, Australia and Professor Emeritus of the Australian National University.
Janine Deakin is a professor at the University of Canberra and Executive Dean of the Faculty of Science and Technology. She is a geneticist with expertise in the areas of comparative genomics, epigenetics, genetic immunology and genome structure and regulation. A majority of her work has focused on the Australian marsupials and monotremes where her cytogenetic and molecular research on marsupial chromosomes and development of strategies to map genomes has provided important insight into the evolution of mammalian genomes.
Melissa A. Wilson is an evolutionary and computational biologist and assistant professor at Arizona State University who studies the evolution of sex chromosomes.
Barbara Ruben Migeon was an American geneticist who was a professor at the Johns Hopkins University Institute of Genetic Medicine. She founded the Johns Hopkins program in Human Genetics and Molecular Biology. Migeon is the author of Females are Mosaics: X inactivation and sex differences in disease. She was awarded the American College of Medical Genetics and Genomics Dimes/Colonel Harland D. Sanders Lifetime Achievement Award in 2016.
Judith Anne Blake is a computational biologist at the Jackson Laboratory and Professor of Mammalian Genetics.
Patricia M. Schulte is a Canadian zoologist who is a Professor of Zoology at the University of British Columbia. Her research considers physiology, genomics and population genetics. Schulte is a Fellow of the Royal Society of Canada and the former President of the Canadian Society of Zoologists.
Paula Elaine Cohen is a British-American geneticist who is a professor and Associate Dean for Research and Graduate Education in the College of Veterinary Medicine at Cornell University. Her research considers DNA repair mechanisms and the regulation of crossing over during mammalian meiosis. She was awarded the National Down Syndrome Society Charles J. Epstein Down Syndrome Research Award in 2004 and elected Fellow of the American Association for the Advancement of Science in 2021.
Siv Gun Elisabeth Andersson is a Swedish evolutionary biologist, professor of molecular evolution at Uppsala University. She is member of both the Royal Swedish Academy of Sciences and of Engineering. She is also Head of basic research at the Knut and Alice Wallenberg Foundation and has been co-director of the Swedish national center for large-scale research Science for Life Laboratory between 2017 and 2021. Her research focuses on the evolution of bacteria, mainly on intracellular parasites.
Henry HQ Heng is a professor of molecular medicine and genetics and of pathology at the Wayne State University School of Medicine. Heng first received his PhD from the University of Toronto Hospital for Sick Children in 1994, mentored by Lap-Chee Tsui. He then completed his post-doc under Peter Moens at York University, before joining the Wayne State University School of Medicine faculty.
Maren Wellenreuther is a German–New Zealand marine scientist, and is a full professor at the University of Auckland, specialising in the development of indigenous fish aquaculture.
References
- 1 2 "Wissenschaftskolleg zu Berlin: Judith Mank, Ph.D." Judith Mank, Ph.D. (in German). Retrieved 2022-09-03.
- ↑ Mank, Judith Elizabeth. "The evolution of reproductive and genomic diversity in ray-finned fishes" . Retrieved 2022-09-07.
- ↑ "Prof. Judith Mank - AcademiaNet". www.academia-net.org. Retrieved 2022-09-03.
- ↑ "The Mank Group". www.ucl.ac.uk. Retrieved 2022-09-03.
- ↑ "The Mank Group". www.zoology.ubc.ca. Retrieved 2022-09-02.
- ↑ Dr. Judith Mank: Genetics of Sex Difference | Researchers Revealed , retrieved 2022-09-03
- ↑ "Fish Species' Y Chromosomes Diverged Even Without Recombination". The Scientist Magazine. Retrieved 2022-09-03.
- ↑ "Judith Mank | Biodiversity Research Centre". biodiversity.ubc.ca. Retrieved 2022-09-03.
- ↑ "Awards". www.amnat.org. Retrieved 2022-09-02.
- ↑ "Society for the Study of Evolution". www.evolutionsociety.org. Retrieved 2022-09-02.
- ↑ "Wissenschaftskolleg zu Berlin: Judith Mank, Ph.D." Judith Mank, Ph.D. Retrieved 2022-09-02.
- ↑ "Judith Mank_Scientific Medal.jpg". Zoological Society of London (ZSL). Retrieved 2022-09-02.
- ↑ "Articles | Biosciences | University of Exeter". biosciences.exeter.ac.uk. Retrieved 2022-09-02.
- ↑ Naylor, David (21 October 2019). "New Honorary Doctors Appointed at Uppsala University - Uppsala University, Sweden". www.uu.se. Retrieved 2022-09-02.
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