A sex-linked recessive gene c produces red-green color blindness. A normal woman whose father was color blind marries a color blind man. (a) What genotypes are possible for the mother of the color blind man? (b) What are the chances that the first child from this marriage will be a color blind boy? (c) Of all the girls produced by these parents, what percentage is expected to be color blind? (d) Of all the children (sex unspecified) from these parents, what proportion is expected to have normal vision?
Answers & Comments
Answer:
A sex-linked recessive gene c produces red-green color blindness. A normal woman whose father was color blind marries a color blind man. (a) What genotypes are possible for the mother of the color blind man? (b) What are the chances that the first child from this marriage will be a color blind boy? (c) Of all the girls produced by these parents, what percentage is expected to be color blind? (d) Of all the children (sex unspecified) from these parents, what proportion is expected to have normal vision?