Question 1

What is expressed when an individual is homozygous recessive for a trait?

Accepted Answer

Recessive trait

Answer

Dominant trait

Answer

Carrier trait

Answer

Heterozygous trait

Question 2

Individuals with at least one dominant allele will not express which type of trait?

Accepted Answer

Recessive trait

Answer

Heterozygous trait

Answer

Dominant trait

Answer

Carrier trait

Question 3

What is an individual called if they are heterozygous for a recessive disorder?

Accepted Answer

Heterozygous carrier

Answer

Dominant carrier

Answer

Homozygous carrier

Answer

Recessive carrier

Question 4

What is the term for an organism with two of the same alleles for a particular trait?

Accepted Answer

Homozygous

Answer

Recessive

Answer

Heterozygous

Answer

Dominant

Question 5

How would you describe an individual who is homozygous for a recessive disorder?

Accepted Answer

Recessive carrier

Answer

Dominant carrier

Answer

Homozygous carrier

Answer

Heterozygous carrier

Question 6

Which type of pea plant would be considered homozygous for the yellow-seed trait?

Accepted Answer

True-breeding yellow-seed pea

Answer

Heterozygous yellow-seed pea

Answer

True-breeding green-seed pea

Answer

Heterozygous green-seed pea

Question 7

What is Tay-Sachs disease?

Accepted Answer

A recessive genetic disorder caused by the absence of enzymes

Answer

A dominant genetic disorder caused by an excess of an enzyme involved in lipid metabolism.

Answer

A recessive genetic disorder caused by an excess of an enzyme involved in lipid metabolism.

Answer

A dominant genetic disorder caused by the lack of an enzyme involved in lipid metabolism.

Question 8

What does it mean when an individual is called a carrier?

Accepted Answer

They have at least one recessive allele

Answer

They have at least one dominant allele

Answer

They express a recessive trait

Answer

They express a dominant trait

Question 9

What is the treatment for cystic fibrosis?

Accepted Answer

Physical therapy, medication, special diets, and replacement digestive enzymes

Answer

Avoiding milk products

Answer

Genetic tests to determine carrier status

Answer

None of the above

Question 10

Which individual in the pedigree has polydactyly?

Accepted Answer

II3

Answer

I2

Answer

III2

Answer

I1

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