How are sex linked genes inherited

As a result of marrying into other European royal families, the princesses Alice and Beatrice spread hemophilia to Russia, Germany, and Spain. They have been on a separate evolutionary path from humans for only million years. Retrieved January 17, , from http:

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That is, 1-B with 2-A, and 1-A with 2-B.



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You need at least one working copy of the gene to be able to see red and green.

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Genetic Linkage

Because there is nothing holding them together, the alleles can pass to gametes in any combination. All of this jumbling and mixing allows for a nearly infinite number of allele combinations. Chimpanzees are our closest living relatives. Male birds have two Z chromosomes, and females have a Z and a W.
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