Question

In: Biology

10. A woman with average height, and type A- blood, and a man with type B+...

10. A woman with average height, and type A- blood, and a man with type B+ blood and achondroplastic dwarfism, have a daughter with type O- blood, average height and cystic fibrosis.

What are the genes found in the gamete the father produced that led to the child? Start with ABO, Rh, height, cystic fibrosis, and sex.

(Separate each gene by a comma, e.g. the gamete produced by a blue-eyed, hairless knuckled person would contain b, kn).

Answer:

11.A woman with average height, and type A- blood, and a man with type B+ blood and achondroplastic dwarfism, have a daughter with type O- blood, average height and cystic fibrosis.

What is the probability of the gamete the mother produced carrying the genes that led to the offspring?

Select one:

a. 1/32

b. 1/16

c. 1/8

d. 1/4

e. 0

Solutions

Expert Solution

10. Let, D be allele responsible for achondroplastic dwarfism and is dominant over d (allele for average height).

Also, f be allele responsible for cystic fibrosis and is recessive to allele F.

Inheritance pattern of achondroplastic dwarfism: autosomal dominant

Inheritance pattern of cystic fibrosis: autosomal recessive.

Traits

genotypes of

mother

genotype of

father

Genotype of

daughter

Blood group AO, Rh-Rh- BO , Rh+Rh- OO , Rh-Rh-
achondroplastic dwarfism dd Dd dd
Cystic fibrosis Ff Ff ff

The genes found in the gamete the father produced that led to the child: O, Rh-, d, f, and X chromosome.

11. The probability of the gamete the mother produced carrying the genes that led to the offspring = (probability of mother contributing O ) x (probability of mother contributing protein Rh-) × (probability of mother contributing gamete d) x (probability of mother contributing gamete f) × (probability of mother contributing X chromosome) = 1/2 × 1/2 × 1/2 × 1/2 × 1/2 = 1/32

Thus, the Correct option is (a). 1/32


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