independent assortment O discontinuous variation QUESTION 6 The common grandfath
ID: 142729 • Letter: I
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independent assortment O discontinuous variation QUESTION 6 The common grandfather of two first cousins has hereditary hemochromatosis, a recessive condition causing abnormal buildup of iron in the body. Neither of the cousins has the disease nor do any of their relatives. If the first cousins mated with each other and had a child what is the chance the child would have hemachromatosis? Assume the unrelated, unaffected parents of the cousins are not carriers (Draw a pedigreel) O 1/6 Click Save and Submit to save and submit. Chek Save All Answers to save all Save All Answers 0Explanation / Answer
Hemochromatosis is transmitted in an autosomal recessive pattern. In a family, grandfather had this condition. All of his children would be carriers of this trait. When carriers mate with normal persons, the chance of their offsprings being carriers is 1/2. So, when persons with the probability of 1/2 of being a carrier mate together, the probability of producing a diseased offspring is
= 1/4 × 1/2 × 1/2
= 1/16
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