if brian has a son who is color - blind, what is known about the genotype of the sons mother?\nshe must have…
if brian has a son who is color - blind, what is known about the genotype of the sons mother?\nshe must have at least one allele for color blindness.\nshe must have two alleles for color blindness.\nshe cannot be homozygous recessive for the gene for color blindness.\nshe cannot be a heterozygous carrier of the gene for color blindness.
Answer
Brief Explanations:
Color - blindness is an X - linked recessive trait. Males have one X and one Y chromosome. A son inherits the Y chromosome from his father and the X chromosome from his mother. If the son is color - blind (has the recessive allele on his X chromosome), he must have received that recessive allele from his mother. So the mother must have at least one allele for color blindness.
Answer:
She must have at least one allele for color blindness.