Scenario from Class:

In humans, being right-handed is dominant to being left-handed and having brown eyes is dominant to having blue eyes. A man who is heterozygous for both traits "falls in love" with a woman who is also heterozygous for both traits.

Question: What is the expected phenotypic ratio from this dihybrid cross?

In English bulldogs, gray fur (G) is dominant to white fur (g) and brown eyes (B) are dominant to blue eyes (b).

Abigail, a part-time English bulldog breeder, crosses a ggbb x GGBb. What is the probability of the parents having an offspring that is Gray with blue eyes?

In fish, fast swimmers (F) are dominant to slow swimmers (f) and long fins (L) are dominant to short fins (l). Given the cross: FFLL x ffll

What is the probability of an offspring being fast with long fins?

In fish, fast swimmers (F) are dominant to slow swimmers (f) and long fins (L) are dominant to short fins (l). Given the cross: FfLl x FfLl

What is the probability of an offspring being slow with short fins?

In pea plants, tall (T) is dominant to short (t) and yellow peas (Y) are dominant to green peas (y).

A parent that is TTYy mates with a Ttyy

Question: How many of the possible offspring would be short and green?