If a woman with a colorblind father married a colorblind man, how many of the ch

Question

If a woman with a colorblind father married a colorblind man, how many of the children could be expected to be colorblind? How many sons? How many daughters?
A) find genotype of parents B) find phenotype of parents C) find genotype of offspring D) phenotype of offspring E) draw a Punnett square to show your work If a woman with a colorblind father married a colorblind man, how many of the children could be expected to be colorblind? How many sons? How many daughters?
A) find genotype of parents B) find phenotype of parents C) find genotype of offspring D) phenotype of offspring E) draw a Punnett square to show your work
A) find genotype of parents B) find phenotype of parents C) find genotype of offspring D) phenotype of offspring E) draw a Punnett square to show your work A) find genotype of parents B) find phenotype of parents C) find genotype of offspring D) phenotype of offspring E) draw a Punnett square to show your work

Explanation / Answer

Colorblindness is an X-linked recessive trait

XC = Dominant allele = Normal vision

Xc = Recessive allele = Colorblindness

Woman: XCXc

Woman's father = XcY

Colorblind man = XcY

Parental cross: XCXc x XcY

Progeny: XCXc XCY XcXc XcY

Total half of the progeny are affected.

Half of the girls are affected.

Half of the boys are affected.

Half of the girls are normal.

Half of the boys are normal.

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