Hemophilia is a genetic disorder that causes a protein required for normal blood clotting to be missing. in a cross with a mother who carries the allele for hemophilia and a father who has normal blood clotting what would be the expected phenotypes of the offspring? a. all females normal, all males normal b. all females normal, all males with hemophilia c. all females carriers of hemophilia, all males normal d. one female normal, one male normal, one female carrier, one male with hemophilia

The correct answer is D

Explanation:

The gen for hemophilia is located in the X chromosome, making the disease a sex-linked trait.

The cross is between a heterozygous woman with a normal man:

- The woman produces two types of gametes: and

- The man produces two types of gametes: and

As a result of a Punnett Square, the expected offspring will be:

1) : normal female

2) : normal female, carrier of hemophilia

3) : normal male

4) : hemophilic male

The correct answer is D: one female normal, one male normal, one female carrier, one male with hemophilia

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