First, Which phenotype of birds will be able to eat the most food when there are more hard-shelled nuts than any other kind?

Now, what genotype do those birds have?

So, what cross would result in the most individuals with the BB genotype? If you still don't know, use the punnett square below to try some crosses

Now return to the question page and select the correct answers.

You have been given the genotypes of the parents already so the next step is to complete a punnett square with the gametes for one parent along the top and the gametes of the other parent down the left side.

Your punnett square should look similar to the one below. If it does not, review the material on gamete formation and how to set up the punnett square and try again.

	B	b
b	Bb	Bb
b	bb	bb

Count up how many of the four possible offspring in the square have the different phenotypes.

Now return to the question page and select the correct answers.

This question requires you to first determine the genotypes of the two birds. In a case of incomplete dominance, you can tell the genotype of an individual by knowing what the phenotypes are. So, what would be the genotype of the bird with an intermediate beak?

What about the bird with a short beak?

Now that you have the genotypes of the parents, complete a punnett square with the gametes for one parent along the top and the gametes of the other parent down the left side.

Your punnett square should look similar to the one below. If it does not, review the material on gamete formation and how to set up the punnett square and try again.

	B	b
B	BB	Bb
B	BB	Bb

Count up how many of the four possible offspring in the square have the long beak phenotype.

Now return to the question page and select the correct answers.