Problems in Genetics:(20 points) 1. The inheritance of a particular facial hair

Question

Problems in Genetics:(20 points) 1. The inheritance of a particular facial hair pattern in a given family is indicated below. Answer the following questions about this family tree. - 4 points a. Which is the correct mechanism of inheritance? i. autosomal dominant ii. autosomal recessive ii. y-linked iv. x-linked dominant v. x-linked recessive b. Using the symbols "F" and "" to indicate dominance and recessiveness, show the genotypes of the parents at B c. In the marriage at C, what is the probability that the next child born will show the trait?

Explanation / Answer

A. i. Autosomal dominant triat.

Autosomal dominant traits appear in both sexes with equal frequency, and both sexes are capable of transmitting these traits to their offspring. Every person with a dominant trait must have inherited the allele from at least one parent;

B. Ff and Ff.

C.Genotype of parents at C are;

FF and Ff.

FF x Ff

Offsprings; FF (Normal), Ff (affected)

50% affected, 50% Normal.

Probability that next child will show the trust is 50%

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