Research topic:Mary Lyon

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Mary Lyon effect

A Dictionary of Zoology | 1999 | | © A Dictionary of Zoology 1999, originally published by Oxford University Press 1999. (Hide copyright information) Copyright

Mary Lyon effect The inactivation of one of the X-chromosomes in female mammals; its discovery was predicted by the geneticist Mary Lyon, who observed that otherwise females would have considerably more genetic material than males, since in mammals the Y-chromosome is tiny whereas the X-chromosome is very large. In marsupials it is the paternally derived X that is inactivated, but in placentals paternal or maternal are inactivated at random in different cell lines.

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Related entries from encyclopedias, dictionaries, and thesauruses

Mary Lyon
Encyclopedia entry from: Encyclopedia of World Biography Mary Lyon Mary Lyon (1797-1849) was the founder of Mount Holyoke Female Seminary and...depression which left many Americans jobless, homeless, and helpless, Mary Lyon opened a new school to educate young women. Though the institution...
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Lyon, Mary
Book article from: The Oxford Companion to United States History Lyon, Mary (1797–1849), educator, founder...Movements . Bibliography Elizabeth Alden Green , Mary Lyon and Mount Holyoke: Opening the Gates , 1979. Amanda Porterfield , Mary Lyon and the Mount Holyoke Missionaries...
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