Which is not a breed of cattle?
a. angus
b. shorthorn
c. longhorn
d. yorkshire

I think yorkshire, because a yorkshire terrier is a breed of dog.

yorkshire its a dog

Explanation:

the father in the first generation probably had the recessive colorblind trait in his x chromosome. if he and his wife both had the colorblind trait, even if she had 1 recessive and 1 dominant, then that trait would be passed on to their kids.

(since you didn't attach the family tree this is just an assumption)

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.