Difference between revisions of "Sex chromosomes"
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| − | '''Sex chromosomes''' are [[chromosome]]s that determine the sex | + | '''Sex chromosomes''' are [[chromosome]]s that determine the biological [[sex]], or gender, of an individual.<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia |
Educational Ministries, Inc. 1998</ref> | Educational Ministries, Inc. 1998</ref> | ||
| − | Human | + | [[Human]] [[cell]]s normally contain two sex chromosomes. Females have two X chromosomes, and males have an X and a Y chromosome.<ref name="genetics">[http://www.dummies.com/WileyCDA/DummiesArticle/id-4097,subcat-MATH.html Genetics: Examining the Basics of Chromosomes]</ref> As a result, about half of babies are born with female sex chromosomes and half are born with male sex chromosomes.<ref name="psychology in your life">Grison, Sarah, and Michael S. Gazzaniga. ''Psychology in Your Life''. W.W. Norton & Company, Inc., 2017.</ref> |
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| + | After chromosomes are determined, they further influence sex by affecting which [[gonad]]s the [[zygote]] will develop through the Y chromosome. The Y chromosome contains a gene called ''SRY'', which stands for "sex determining region on the Y chromosome." Of course, the SRY gene is absent on the X chromosome.<ref name="psychology in your life"></ref> | ||
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| + | ==See also== | ||
| + | *[[Autosomal chromosome]]s: "Autosomal simply refers to non-sex chromosomes. So, sticking with the human example, do the math, and you can see that humans have 44 autosomal chromosomes."<ref name="genetics"></ref> | ||
==References== | ==References== | ||
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{{reflist}} | {{reflist}} | ||
[[Category:Genetics]] | [[Category:Genetics]] | ||
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Latest revision as of 02:07, August 5, 2018
Sex chromosomes are chromosomes that determine the biological sex, or gender, of an individual.[1]
Human cells normally contain two sex chromosomes. Females have two X chromosomes, and males have an X and a Y chromosome.[2] As a result, about half of babies are born with female sex chromosomes and half are born with male sex chromosomes.[3]
After chromosomes are determined, they further influence sex by affecting which gonads the zygote will develop through the Y chromosome. The Y chromosome contains a gene called SRY, which stands for "sex determining region on the Y chromosome." Of course, the SRY gene is absent on the X chromosome.[3]
See also
- Autosomal chromosomes: "Autosomal simply refers to non-sex chromosomes. So, sticking with the human example, do the math, and you can see that humans have 44 autosomal chromosomes."[2]