Dictionary » H » Hemizygosity

Hemizygosity

Definition

noun

A genetic condition where there is only one copy of a gene in an otherwise diploid cell or organism.


Supplement

For example, a copy of a gene that is deleted will result in hemizygosity in a diploid cell or organism. Hemizygosity is also displayed in human males where there is only one X chromosome (as the other sex chromosome is a Y chromosome). In another example, male honeybees are hemizygous as they develop from unfertilized eggs (unlike female honeybees that develop from fertilized eggs and thus have two sets of genes).


Word origin: Greek hēmi- half + zygosity.
Related forms: hemizygous (adjective)

Compare: homozygosity, heterozygosity
See also: zygosity


Please contribute to this project, if you have more information about this term feel free to edit this page



Results from our forum


Anyone know much on Hemizygous?

... that the Y chromosome is hemizygous, in the individual, or the cell, is also not accurate. So, to address PoOr's original question of relative hemizygosity, effectively, women are more hemizygous than men, but genotypically, men are more hemizygous. I hope this makes my posting clearer. Now, ...

See entire post
by PoOr
Fri Jul 27, 2007 10:07 am
 
Forum: Genetics
Topic: Anyone know much on Hemizygous?
Replies: 10
Views: 8961

Anyone know much on Hemizygous?

... that the Y chromosome is hemizygous, in the individual, or the cell, is also not accurate. So, to address PoOr's original question of relative hemizygosity, effectively, women are more hemizygous than men, but genotypically, men are more hemizygous. I hope this makes my posting clearer. Now, ...

See entire post
by wbla3335
Fri Jul 27, 2007 6:44 am
 
Forum: Genetics
Topic: Anyone know much on Hemizygous?
Replies: 10
Views: 8961

Anyone know much on Hemizygous?

... X chromosome, which is not true barring incest and no recombination or spontaneous mutation through a couple of generations. Homo-, hetero-, and hemizygosity usually refer to genes or some other defined but limited stretch of DNA rather than entire chromosomes, although the term hemizygous is ...

See entire post
by wbla3335
Thu Jul 26, 2007 10:37 am
 
Forum: Genetics
Topic: Anyone know much on Hemizygous?
Replies: 10
Views: 8961


This page was last modified 08:25, 20 May 2009. This page has been accessed 12,707 times. 
What links here | Related changes | Permanent link