Living Earth Mendel

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

• chemistry

• geology

• physics

• genetics

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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.

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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

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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.

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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

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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

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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

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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

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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

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