Aboy with klinefelter syndrome (47,xxy) is born to a mother who is phenotypically normal and a father who has the x-linked skin condition called anhidrotic ectodermal dysplasia. the mother’s skin is completely normal with no signs of the skin abnormality. in contrast, her son has patches of normal skin and patches of abnormal skin. which parent contributed the abnormal gamete, when did the meiotic mistake occur, and explain the son’s skin phenotype.

The upper forelimbs of humans and bats have fairly similar skeletal structures, whereas the correspondingbones in whales have very different shapes and proportions. however, genetic data suggest that all three kindsof organisms diverged from a common ancestor at about the same time. which of the following is the mostlikely explanation for these data? a) humans and bats evolved by natural selection, and whales evolved by lamarckian mechanisms.b) forelimb evolution was adaptive in people and bats, but not in whales.c) natural selection in an aquatic environment resulted in significant changes to whale forelimb anatomy.d) genes mutate faster in whales than in humans or bats.e) whales are not properly classified as mammals.