16. Mexican hairless dogs have little hair and few teeth. When a Mexican hairless is mated to another breed of dog, about half of the puppies are hairless. When two Mexican hairless dogs are mated to each other, about 1/3 of the surviving puppies have hair, and about 2/3 of the surviving puppies are hairless. However, about two out of eight puppies from this type of cross are born grossly deformed and do not survive. Explain this pattern of inheritance.

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vicobusso vicobusso · Answer 1 · 2019-07-29T23:06:52+02:00

Here you can tell that it is heterozygous with a dominant allele to be a hairless dog, for example, Hh, where H is dominant.

When you cross one hairless (Hh) with a not hairless dog (hh), Punnett square will show chances are half hairless and half not hairless.

When you cross two hairless (Hh), Punnett square will show three cases: HH, Hh, and hh.

hh is not hairless.

Hh is hairless.

HH is a codominance in which both parents gave the hairless allele, and this may be the not surviving dogs.