Dictionary » H » Heterogametic




Having more than one kind of sex chromosome (or gamete)


In humans, males are naturally heterogametic because they possess two types of sex chromosome: X-chromosome and Y-chromosome.

In gamete production, the males produce spermatozoa, each containing one sex chromosome, which may either be X or Y-chromosome. Thus, they also have two types of gametes: a sperm carrying the X-chromosome and another with the Y-chromosome.

Word origin: Greek h├ęteros (other, different) Compare:

Related term(s):

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

Results from our forum


Aren't the unmatched chromosomes female in birds? In birds, and lepidoptera, among others, females are the heterogametic sex (assuming "unmatched" means XY or ZW)

See entire post
by Tweedy
Fri Jul 10, 2009 12:36 pm
Forum: Genetics
Topic: heritability of Z-linked trait
Replies: 2
Views: 3511

Anyone know much on Hemizygous?

To clarify some of the terminology: female humans are referred to as homogametic - they have only one type of sex chromosome, the X. Males are heterogametic, having two different types of sex chromosomes, the X and the Y. In birds and some other animals, females are heterogametic, and males are ...

See entire post
by wbla3335
Thu Jul 26, 2007 10:37 am
Forum: Genetics
Topic: Anyone know much on Hemizygous?
Replies: 10
Views: 9913

This page was last modified 08:17, 7 November 2011. This page has been accessed 13,086 times. 
What links here | Related changes | Permanent link