Answers: B, B and A. Are these correct? Pigs can be solid (dominant) or spotted

Question

Answers: B, B and A. Are these correct?

Pigs can be solid (dominant) or spotted (recessive) and have curly (dominant) or straight (recessive) fur. Use gene symbols D and d for solid and spotted, respectively and R and r for curly and straight, respectively. One solid, curly pig and one spotted curly pig produce a large litter of piglets. 16 are solid, curly; 5 are solid, straight; 15 are spotted, curly; and 6 are spotted, straight. What are the genoypes of the parents?

a. DdRRxddR-

b. DdRrxddRr

c. DDRrxddRr

d. DdRRxD-R-

Two dice are thrown. What is the probability that the two will have different numbers?

a. 5/6

b. 1/6

c. 1/36

d. 35/36

In moths, some mutants have hairless legs. Two normal moths with hairy legs are mated together and hundreds of progeny are produced. Of these progeny, half of the daughters have hairless legs. The rest of the progeny are normal. What is the genetic basis for the hairless leg mutation? Which parent harbors the mutant allele?

a. Sex-linked recessive and father is the carrier of the mutant allele

b. Sex-linked recessive and the mother is the carrier of the mutant allele

Explanation / Answer

1. b. DdRrxddRr

2.

The possibility of one die rolling a six is totally unrelated to the other die.

Imagine rolling one die after the other. I think we all agree it's the same as rolling them at the same time.

3. b. Sex-linked recessive and the mother is the carrier of the mutant allele

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