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Lexiegirl123
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What is the best evidence to prove that Irene was heterozygous for hemophilia

AAlice carried the recessive allele
BAlexandra carried the recessive allele
CFredrick carried the recessive allele
DWaldemar carried the recessive allele

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The correct answer for this from the choices listed above would be A. The best evidence to prove that Irene was heterozygous for hemophilia would be that Alice carried the recessive allele. Hope this answers the question. Have a nice day.

Answer;

A. Alice carried the recessive allele

Explanation;

-Hemophilia is an inherited bleeding disorder in which one lacks or have low levels of clotting factors. This keeps the blood from clotting. It is inherited as an X-linked recessive trait.

-X-linked recessive genetic disorders are conditions caused by an abnormal gene on the X chromosome. Females who have a disease gene present on one of their X chromosomes are “carriers” for that disorder. Carrier females usually do not display symptoms of the disorder because they have another copy of the gene that can usually compensate for the copy with the disease-causing change or mutation.

-A male has only one X chromosome and, if he inherits an X chromosome that contains a disease-causing gene, he will develop the disease. Males with X-linked disorders pass the disease gene to all of their daughters, who will be carriers if the other X chromosome from their mother is normal.

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