## Chapter 14

Last update by Shanal on 10/20/2013
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# A man with type A blood marries a woman with type B blood. Their child has type O blood. What are the genotypes of these individuals? What other genotypes, and in what frequencies, would you expect in offspring from this marriage?

Man IAi; woman IBi; child ii. Other genotypes for children are 1/4 IAIB ,1/4 IAi, 1/4 IBi

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Related Quiz Content

Phenylketonuria (PKU) is an inherited disease caused by a recessive allele. If a woman and her husband, who are both carriers, have three children, what is the probability of each of the following?

A) All three children are of normal phenotype.

B) One or more of the three children have the disease.

C) All three children have the disease.

D)At least one child is phenotypically normal.

A) 3/4 × 3/4 × 3/4 = 27/64

B) 1 - 27/64 = 37/64

C) 1/4 × 1/4 × 1/4 = 1/64

D) 1 - 1/64 = 63/64

The genotype of F1 individuals in a tetrahybrid cross is AaBbCcDd. Assuming independent assortment of these four genes, what are the probabilities that F2 offspring will have the following genotypes?

A) aabbccdd

B) AaBbCcDd

C) AABBCCDD

D) AaBBccDd

E) AaBBCCdd

A) 1/256

B) 1/16

C) 1/256

D) 1/64

E) 1/128

What is the probability that each of the following pairs of parents will produce the indicated offspring? (Assume independent assortment of all gene pairs.)

A) AABBCC × aabbcc → AaBbCc

B) AABbCc × AaBbCc → AAbbCC

C) AaBbCc × AaBbCc → AaBbCc

D) aaBbCC × AABbcc → AaBbCc

A) 1

B) 1/32

C) 1/8

D) 1/2

Karen and Steve each have a sibling with sickle-cell disease. Neither Karen nor Steve nor any of their parents have the disease, and none of them have been tested to reveal sickle-cell trait. Based on this incomplete information, calculate the probability that if this couple has a child, the child will have sickle-cell disease.

1/9