Let’s assume you are now in charge of a breeding program, which has cattle. Your boss would like for you to cross the following two animals, a red-polled bull with red-polled cow. For both the bull and cow, the sires had horns.

1. What is the genotypic ratio for the above cross?

2. What is the phenotypic ratio for the above cross?

3. What is the probability of getting a red horned animal from the cross above?

What would all the offspring look like (phenotypic ratio) if you crossed a Black Lab (genotype EeBb) with a Yellow Lab (genotype eebb). Remember ee is epistatic to B or b

4. What is the genotypic ratio for the above cross?

5. What is the phenotypic ratio for the above cross?

6. What is the probability of getting a yellow lab?

Assume your 205 day weaning weight for cattle was 560 lbs and now has been improved to 600 lbs, because you cross two animals which came had the following weaning weight averages (675 and 550). So, what is the percent hybrid vigor in this example?