Ensure answers are clearly labelled a) and b). Consider the following pedigree, where solid symbols represent affected individuals. Assume complete penetrance. a) Determine whether each of the following modes of inheritance (a – d) is possible for the pedigree above. Answer yes or no. List the modes of inheritance in your answer as they are listed below. (2) 1) Autosomal recessive (AR) 2) Autosomal dominant (AD) 3) X-linked recessive (XLR) 4) X-linked dominant (XLD) b) Based on your choices in (a), what genotype can II-7 not have? (1)
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2) Autosomal dominant (AD): No, because if it were autosomal dominant, at least one of the parents (I-1 or I-2) would have to be affected, which is not the case. 3) X-linked recessive (XLR): Yes, because the mother (I-2) can be a carrier and pass the recessive Show more…
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