6.8 Color blindness in human beings is an X-linked trait. A man who is color bli

Question

6.8 Color blindness in human beings is an X-linked trait. A man who is color blind has a 45,X (Turner syndrome) daughter who is also color blind. Did the nondisjunction that led to the 45,X child occur in the mother or the father? Explain the evidence supporting your answer. 1 6.9 The long arm of the normal human Y ch contains a large region that is duplicated. In some mutant Y chromosomes, the region between the duplications is missing, and only one copy of the duplication is present. How can this observation be explained? Does the observation tell you anything about how the duplications are oriented in the

Explanation / Answer

6.8. If the child is female, she will receive one X chromosome from father and one chromosome from the mother. To have color blind female child, father should be diseased and mother must be a carrier of the disease. Non-disjunction must have occur in the mother.

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