This is one question that has 5 parts to it (a-f). They are all related. Any hel

Question

This is one question that has 5 parts to it (a-f). They are all related. Any help would be greatly appreciated. Thank you!

1. Having free earlobes (F) is a dominant trait in humans, and having attached earlobes (f) is recessive. A father has the genotype ff, and the mother has the genotype Ff.

a) What is the father’s phenotype? (2 points)

b) What is the mother's phenotype? (2 points)

d) Describe the genotype ratio for their offspring. (2 points)

e) Describe the phenotype ratio for their offspring. (2 points)

f) If they have a child, what is the probability of their child having free earlobes? (2 points)

Explanation / Answer

A. The father's phenotype is attached earlobes as he has recessive trait

B. The mother's phenotype is free earlobes as she has dominant trait

C. Mother will have gamates as F and f

Father will have gamates as f and f

So the punnet square will have Ff ,ff ,Ff and ff as offspring.

D. As half of offspring has Ff and half has ff so the genotypic ratio of offspring is 1:1.

E. Half of chidren have free earlobes having genotype Ff and half with genotype ff will have attached earlobes

So the phenotypic ratio is 1:1.

F. The probability of having a chid with free earlobe is 2/4 or 1/2.

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