There is a teacher from Texas that loves hairless guinea pigs. In guinea pigs, the dominant allele H codes for the trait of having hair and the allele h codes for the trait of being hairless. (Assume Mendelian inheritance). Let’s say that this teacher receives her wish of finding a hairless guinea pig at a pet store and names her Genevieve. She finds another guinea pig at a store with hair that she names Fred.
While she can be certain of Genevieve’s genotype, how could she determine what genotype Fred is? She can do a test cross! A test cross involves breeding an organism with a dominant trait (like Fred) with an organism that exhibits a recessive trait (like Genevieve).

9. Genevieve has the genotype _______.

10. Fred’s genotype could be or _.

11. If Fred was genotype and bred with Genevieve…

13. If Fred was genotype ____ and bred with Genevieve…

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Oseni Oseni · Answer 1 · 2021-02-18T01:41:22+01:00

Answer:

See the answer below

Explanation:

9. The genotype of Genevieve would be hh since hairlessness (h) is a recessive trait.

10. Fred's genotype could be HH or Hh since hairiness (H) is dominant over hairlessness (h)

11. If Fred's genotype is HH and it breeds with Genevieve:

HH x hh

Hh Hh Hh Hh

All the resulting offspring would be hairy with the genotype Hh.

12. If Fred has the genotype Hh and is bred with Genevieve:

Hh x hh

Hh Hh hh hh

50% of the resulting offspring would be hairy with the genotype Hh and the remaining 50% would be hairless.