Anhidrotic Ectodermal dyplasia Inheritance in Klinefelter
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A baby boy with Klinefelter's syndrome is born to a mother who is phenotypically normal and a father who has the X-linked skin condition called anhidrotic ectodermal dyplasia (if you don't know this condition, research it). The mother's skin is completely normal with no signs of skin abnormality. In contrast, her son has patches of normal skin and patches of abnormal skin.
a. Which parent contributed the abnormal gene?
b. Using the appropriate genetic terminology, describe the meiotic mistake that
occurred. Be sure to indicate in which division the mistake occurred.
c. Using appropriate genetic terminology, explain the son's skin phenotype.
d. Name a common feature of anhidrosis.
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Solution Summary
Most people with hypohidrotic ectodermal dysplasia have a reduced ability to sweat (hypohidrosis) because they have fewer sweat glands than normal or their sweat glands do not function properly. Affected individuals tend to have sparse scalp and body hair (hypotrichosis). The hair is often light-colored, brittle, and slow-growing. This condition is also characterized by absent teeth (hypodontia) or teeth that are malformed. The teeth that are present are frequently small and pointed. Inheritance pattern is X-linked.
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