Mendel concluded that _____ factors control each inherited trait.

Parents pass their traits down to their offspring through their __________.

Self-pollination is when the pollen lands on _____.

A true-breeding purple plant and a true-breeding white plant cross-pollinate. The offspring will be _____.

A genetic factor that blocks another genetic factor is called a(n) _____.

Blood type in humans is controlled by ____ alleles.

In a Punnett square, a capital letter stands for a ____ allele.

Look at the Punnett square. If orange is a dominant allele and purple is recessive, what color ratio will the flowers of the offspring plants have?

A man and a woman want to have a child, but the man is heterozygous (Cc) for a recessive trait that causes a fatal illness. What is the probability of a child’s inheriting the trait?

A and B are the same kind of fish. A has a genotype for narrow fins (ww), and B has a genotype for wide fins (W-). Which of the following genotypes of parent fish will produce only offspring having wide fins?

Bird A has the genotype ll for bill length, and Bird B is LL. The bills of their offspring would be:

What type of inheritance determines eye color?

Which of the following is an example of multiple alleles?

A ____ is part of the DNA code on a chromosome.

Which of the following is NOT an external cause of mutations?

Mutations cause changes in _____.