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Gwar [14]
3 years ago
9

The pedigree on the right shows the inheritance pattern for an X-linked recessive disorder.

Biology
2 answers:
Sladkaya [172]3 years ago
8 0

The right answers are : XAXA and XAXa.

A genetic disease is referred to as X-linked recessive inheritance when:

* the gene involved in the mutation is on the sex chromosome X

* the mutation is recessive, a man carrying the mutant allele will be ill, because hemizygote for the X chromosome. The presence of both mutant alleles is necessary for the disease to be expressed in a girl.

According to the image, the mother has always transmitted a healthy allele (XA) so the answers are the genotypes carrying this allele.

Tpy6a [65]3 years ago
6 0
I think it's XAXA and XAXa because x-linked rec. usually is only fully present in males
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