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]] [[ | 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|mammals]]), the female is the homogametic sex - females have two identical [[Homologous chromosomes|homologous]] [[Chromosomes|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' Seminars in Cell &amp;amp; Developmental Biology 18(3):389-400fckLRAvailable at: http://www.ncbi.nlm.nih.gov/pubmed/17400006 (Accessed 23/10/2012)</ref>. | ||
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' Journal of Biology 8(4): 38 Available at: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2688912/ (Accessed 23/10/2012)</ref>.<br> | 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' Journal of Biology 8(4): 38 Available at: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2688912/ (Accessed 23/10/2012)</ref>.<br> | ||
Revision as of 18:28, 25 November 2013
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].
References
- ↑ Waters P.D. (2007) 'Mammalian sex--Origin and evolution of the Y chromosome and SRY' Seminars in Cell &amp; Developmental Biology 18(3):389-400fckLRAvailable at: http://www.ncbi.nlm.nih.gov/pubmed/17400006 (Accessed 23/10/2012)
- ↑ Tower J. (2009) 'The genetics of gender and life span' Journal of Biology 8(4): 38 Available at: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2688912/ (Accessed 23/10/2012)