Heredity 7th Grade Science

What is the difference between characteristics and traits?

• They are exactly the same thing.

• Characteristics are specific (green, round) and traits are in general terms (seed color, seed shape).

• Characteristics are general (seed color, seed shape) and traits are specific (green, round).

• Characteristics are for animals and traits are for plants.

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What are genes?

• Segments of DNA found in chromosomes.

• Another word used for chromosomes.

• Several chromosomes put together.

• An article of clothing.

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What are alleles?

• Different versions of a chromosome

• Different versions of DNA

• Different versions of a gene

• Different versions of a phenotype

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What is the difference between genotype and phenotype?

• Genotype is observable traits, Phenotype is the combination of alleles that you inherit.

• Genotype is the combination of alleles that you inherit, Phenotype is observable traits.

• They are identical

• Phenotype is used to describe physical traits, and Genotype is used to describe personality traits.

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Which is true about a dominant allele?

• Dominant alleles contribute to the phenotype only when two copies are present in the genotype.

• Dominant alleles don't contribute to the phenotype at all.

• Dominant alleles are the only contributors to the phenotype.

• Dominant alleles contribute to the phenotype if one or two copies are present in the genotype.

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How can recessive alleles still be expressed in the phenotype?

• When two copies of the recessive allele are present.

• When zero copies of the recessive alleles are present.

• When one copy of the recessive allele is present.

• They can never be expressed in the phenotype.

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Some characteristics, such as the color of your skin, hair, and eyes, are the result of several genes....

• Being absent completely

• Acting independently

• Acting together

• Canceling each other out

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Which of the following is NOT an example of a single gene influencing many traits?

• Skin, hair, and eye color in humans.

• A white tiger's fur and blue eye color.

• All of the traits associated with sickle cell anemia.

The arctic fox has a white coat in the winter and a brown coat in the summer. This is an example of...

• The environment's influence on traits.

• The different types of foxes.

• Genetic engineering on foxes.

• The personality of the arctic fox.

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Pink snapdragons are produced by a cross between a red snapdragon and a white snapdragon. This is an example of...

• Complete dominance

• Zero dominance

• Incomplete dominance

• Random results