Consider two imaginary genes, a “finger number gene” and a “hand size gene”, in
ID: 66040 • Letter: C
Question
Consider two imaginary genes, a “finger number gene” and a “hand size gene”, in an imaginary population of aliens. Since we’re imagining things, let’s also imagine that the aliens have diploid genomes and life cycles just like human beings. Each gene has two possible alleles. For the finger number gene, "N" is the dominant allele for having 4 fingers on each hand, and "n" is the recessive allele for having 5 fingers on each hand. For the hand size gene, "H" is the dominant allele for having small hands, and "h" is the recessive allele for having large hands. Neither gene is on a sex chromosome.
Suppose an alien with the genotype NNHH mates with an alien having the genotype nnhh. Under the hypothesis of strict dependent assortment, what are the genotypes of gametes that their offspring could NOT produce?
Question 24 options:
nH and NH
Nh and NH
NH and nh
nH and Nh
NH, Nh, nH, and nh
nH and NH
Nh and NH
NH and nh
nH and Nh
NH, Nh, nH, and nh
Explanation / Answer
d. nH and Nh
In dependent assortment, the inherited allele combinations remain same; no recombinant gametes can be produced. So, all gametes will be NH and nh, no Nh and nH can be produced.