pedigrees are used to help geneticists understand how traits are inherited between generations. the…

pedigrees are used to help geneticists understand how traits are inherited between generations. the romanovs, a russian royal family, had a history of hemophilia, a sex - linked disorder that is determined by a recessive allele on the x chromosome.\nwhat is the best evidence to prove that irene was heterozygous for hemophilia?

pedigrees are used to help geneticists understand how traits are inherited between generations. the romanovs, a russian royal family, had a history of hemophilia, a sex - linked disorder that is determined by a recessive allele on the x chromosome.\nwhat is the best evidence to prove that irene was heterozygous for hemophilia?

Answer

Brief Explanations:

Hemophilia is a sex - linked recessive disorder. Her sons Waldemar and Henry have hemophilia. Since sons inherit their X - chromosome from their mother, and they have the disorder, it means Irene must have passed on the recessive allele for hemophilia. Since she doesn't have the disorder herself (not shown as red), she must be heterozygous.

Answer:

Her sons Waldemar and Henry have hemophilia.