Homogametic: Difference between revisions
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This term refers to the sex of a species in which the [[Sex chromosomes|sex chromosomes]] are identical. For example, in humans (and most other mammals), the female is the homogametic sex - females have two identical [[Homologous chromosomes|homologous]] chromosomes (XX), whereas males, the heterogametic sex, have two homologous chromosomes of different sizes with different genes (XY). <ref>Waters P.D. (2007) Mammalian sex--Origin and evolution of the Y chromosome and SRY. Available at: http://www.ncbi.nlm.nih.gov/pubmed/17400006 (accessed 23/10/2012)</ref> | |||
<references /> | In some species, such as birds, females are the heterogametic sex (ZW) and males the homogametic (ZZ).<ref>Tower J. (2009) The genetics of gender and life span. Available at: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2688912/. Accessed 23/10/2012</ref> | ||
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Revision as of 16:09, 23 October 2012
This term refers to the sex of a species in which the sex chromosomes are identical. For example, in humans (and most other mammals), the female is the homogametic sex - females have two identical homologous chromosomes (XX), whereas males, the heterogametic sex, have two homologous chromosomes of different sizes with different genes (XY). [1]
In some species, such as birds, females are the heterogametic sex (ZW) and males the homogametic (ZZ).[2]
- ↑ Waters P.D. (2007) Mammalian sex--Origin and evolution of the Y chromosome and SRY. Available at: http://www.ncbi.nlm.nih.gov/pubmed/17400006 (accessed 23/10/2012)
- ↑ Tower J. (2009) The genetics of gender and life span. Available at: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2688912/. Accessed 23/10/2012