Red-green colorblindness is a recessive X-linked disorder. A woman who is homozygous for normal vision has children with a man who has red-green colorblindness. Which of the following phenotypes would NOT be possible in their children?
a) sons with red-green colorblindness
b) daughters who are heterozygous for the red-green colorblindess gene
c) daughters who have normal vision
d) sons who have the normal allele
Ans: a) sons with red-green colorblindness
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Fill in the blank(s) with correct word
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Fill in the blank(s) with correct word
Dolphins (which are mammals) and sharks (which are fish) have stiff dorsal fins projecting from their backs that help them maneuver through water. These relationships of structures to each other are best described as
A) vestigial structures. B) homologous structures. C) mutations. D) analogous structures.