4.1 4.2 4.4 Heredity Review

An advantage of sexual reproduction over asexual reproduction is that sexual reproduction:

• decreases diversity within the species.

• increases diversity within the species.

• produces offspring that are genetically identical to the parents.

• produce offspring with more genes than the parents.

Explain what happens when an offspring is produced through sexual reproduction.

• Many egg cells and many sperm cells join through fertilization.

• Many egg cells and one sperm cell join through fertilization.

• One egg cell and many sperm cells join through fertilization.

• One egg cell and one sperm cell join through fertilzation.

What controls the phenotype of an organism?

• the environment

• the parents' choices

• the genetic material in cells

• hormones

The diploid state of a cell provides a simple explanation for why that cell contains ________.

• one gene for each trait

• two genes for each trait

• three genes for each trait

• four genes for each trait

Two parents represented in the Punnett square are about to produce their first offspring. What does the Punnett square indicate about the offspring?

• The offspring will definitely have the genotype Aa.

• The offspring will definitely have the genotype aa.

• The offspring has a 25% chance of having the genotype Aa.

• The offspring has a 50% chance of having the genotype aa.

In a flower, the allele for red color is dominant (R) over the allele for white color (r). A cross between two red flowers is shown in the Punnett square. What is the genotype of the offspring in box X?

• rr

• Rr

• RR

• RR and rr

Choose the best word that completes the sentence.

Parents pass _______ to their offspring when they reproduce.

• traits

• learned

• genes

• inherited

Choose the best word that completes the sentence.

_______ of offspring can be seen and are things like eye color, height, and hair color.

• Traits

• Learned

• Genes

• Inherited

Choose the best word that completes the sentence.

Some things, like eye color, are _______ from parents.

• traits

• learned

• genes

• inherited

Choose the best word that completes the sentence.

Things like riding a bike and likes and dislikes are ________.

• traits

• learned

• genes

• inherited