Genetics Quiz 1 Review

What is heredity?

• the passing of traits from parents to offspring
• the passing of traits from offspring to parents
• our genetic code (DNA)

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Genetics is the study of what subject?

• heredity

• cells

• reproduction

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The term homozygous refers to what type of genotype?

• two different alleles (one dominant & one recessive)
• two of the same alleles (two dominant or two recessive)
• two different letters (ex. one A and one B)

Phenotype describes __________________

• physical appearance

• genes

• type of organism

Genotype describes ________________

• physical appearance
• genes
• the type of organism

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What is an allele?

• a gene
• different forms (types) of a gene
• all of your DNA

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If an allele is recessive, what does that mean?

• It is stronger than a dominant allele.
• It is only seen if both alleles are recessive.
• It is never seen.

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What does the genotype for a trait BB represent?

• Each letter represents the dominant allele inherited from each parent.

• Both letters represent the dominant allele inherited from the mother.

• Both letters represent the recessive allele inherited from the father.

• Each letter represents the recessive allele inherited from each parent.

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Brown fur (B) is dominant to white fur (b) in rabbits. Which genotype would result from two parents that are homozygous for brown fur?

• BB

• Bb

• b

• B

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How is it possible for an organism to have a recessive phenotype for a trait such as white flowers in pea plants?

• The organism inherits the recessive allele from one parent.

• The organism inherits the recessive allele from both parents.

• The organism fails to inherit the alleles for the trait from either parent.

• The organism acquires the trait from the environment.

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