X linked genes Notes: Definitions & Explanations PDF | Download eBooks
Study X linked genes lecture notes PDF with biology definitions and explanation to study What are X linked genes?. Study x linked genes explanation with biology terms to review biology course for online degree programs.
X linked genes Definition:
Human X chromosome contains approximately 1,100 genes, which are called X-linked genes.
Campbell Biology by J.B. Reece, L.A. Urry, M.L. Cain, S.A. Wasserman, P.V. Minorsky, R.B. Jackson
X linked genes Notes:
This is the same as sex linked gene except the gene is specifically located on the X chromosome. A very good example of this is hemophilia. The genes associated with these conditions are located on the X chromosome, which is one of the two sex chromosomes. In males (who have only one X chromosome), one altered copy of the gene in each cell is sufficient to cause the condition. In females (who have two X chromosomes), a mutation would have to occur in both copies of the gene to cause the disorder. Because it is unlikely that females will have two altered copies of this gene, it is very rare for females to have hemophilia.
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