Assume that short ear lobes in humans are an autosomal dominant trait that exhibits 60% penetrance. A person who is heterozygous for short ear lobes mates with a person who is homozygous for normal ear lobes. What is the probability that their first child will have short ear lobes? O a. 10% b. 30% O c. 15% O d. 70% O e. 50%

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A:

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Inheritance and Mendelian Genetics

Inheritance means the passing of traits to offspring from parents. These traits could be passed either through asexual reproduction or sexual reproduction. The offspring receives the genetic material from the parents. Mendelian inheritance is a certain biological inheritance that follows the rules and principles laid down by Gregor Mendel in 1865. The initial hypothesis was considered wrong, but other inheritance theories modified the concept of inheritance and thus genetics.