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)

Genetics is the study of what subject?

• heredity

• cells

• reproduction

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

What is an allele?

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

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.

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.

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

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.