Question

Asexually reproducing animal has two unlinked genes, one for head shape (H) and one for tail length (T). Its genotype is HhTt. Which of the following genotypes is possible in a gamete (egg or sperm) from this organisma. Hhb. ttc. Td. HhTte. HT

Answer 1

Answer: e. HT

Explanation:

Gametes are sex cells, which can be an egg or a sperm. They only have one allele of each gene. Head shape is a trait coded by one gene (H) and tail length is another trait coded by another gene (T) Organisms are diploid, this means they have two alleles for each gene, so in this example the animal is HhTt. But, as it was said before, gametes only have one allele of each gene, then the gametes produced will be: HT, Ht, hT and ht.

From the options provided, the only one correct is HT.

• Hh is not correct because it has two alleles of each gene (Hh)
• tt is not correct for the same reason, two alleles of each gene (tt)
• T is not correct because the allele fo the other gene (H or h) is missing
• HhTt is not correct because it has two alleles of each gene