Heredity

Mendel’s experiments form the basis of __________, the scientific study of heredity and variation in organisms.

• chemistry

• geology

• physics

• genetics

In his first round of experiments, which of the following did Mendel observe in the offspring?

• One trait in each pairing was dominant and appeared in all of the offspring.

• A brand new trait appeared in all of the offspring.

• One trait appeared in half of the offspring, and the other trait appeared in the other half of the offspring.

Which plants that Mendel used in his experiments were true breeding?

• first filial generation

• the parental generation

• second-filial generation

After the first-generation plants self-pollinated, all of the second-generation plants had the same forms of the same traits.

• True

• False

A male horse with one dominant and one recessive allele for coat color pairs with a female horse that also has one dominant and one recessive trait for coat color. If a black coat is the dominant trait, about how many of their offspring will have a chestnut coat?

• They will all have a chestnut coat.

• three-fourths

• one-fourth

• They will all have a black coat.

What is heredity?

• a specific characteristic that an organism can pass to its offspring

• different forms of a gene that produce the variations in a genetically inherited trait

• the passing of traits from parents to offspring

• segments of DNA that determine traits and are passed down from parent to offspring

What is genetics?

• a specific characteristic that an organism can pass to its offspring

• different forms of a gene that produce the variations in a genetically inherited trait

• segments of DNA that determine traits and are passed down from parent to offspring

• the scientific study of heredity and variation in organisms

What are genes?

• different forms of a gene that produce the variations in a genetically inherited trait

• segments of DNA that determine traits and are passed down from parent to offspring

• characteristics that cannot be passed from parent to offspring

• a specific characteristic that an organism can pass to its offspring

Alleles are __________.

• a specific characteristic that an organism can pass to its offspring

• organisms that always share the same exact traits

• characteristics that cannot be passed from parent to offspring

• different forms of a gene that produce the variations in a genetically inherited trait

A trait is __________.

• a specific characteristic that an organism can pass to its offspring

• organisms that always share the same exact traits

• a characteristic that cannot be passed from parent to offspring

• an allele that is always expressed when the allele is present