Quiz 10 Review

In regard to errors of meiosis, a duplication occurs when a fragment joins a nonhomologous chromosome.
a) True
b) False

B

In fruit flies, a female will have white eyes only if both her X chromosomes carry the wild type allele.
a) True
b) False

B

Tetraploidy could result from the failure of a 2n zygote to divide after replicating its chromosomes.
a) True
b) False

A

Crossing over, which accounts for the recombination of linked genes, occurs during prophase of meiosis I.
a) True
b) False

A

Genes located near each other on the same chromosome tend to be inherited together and are known as linked genes.
a) True
b) False

A

Cells of Drosophila melanogaster have four pairs of chromosomes.
a) True
b) False

A

In birds, males are the homogametic sex.
a) True
b) False

A

Turner syndrome is an example of trisomy
a) True
b) False

B

A Barr body is a condensed and inactivated X chromosome.
a) True
b) False

A

For a recessive, sex-linked trait to be expressed, females need to inherit only one copy of the allele.
a) True
b) False

B

Nondisjunction could occur during anaphase I or anaphase II.
a) True
b) False

A

Klinefelter syndrome is an aneuploid condition.
a) True
b) False

A

A monosomic zygote has only one copy of a particular chromosome.
a) True
b) False

A

The phenotypic effects of chromosomal deletions tend to be more severe than duplications.
a) True
b) False

A

The sry gene is a sex-determining region on the Y chromosome that will result in ovarian development from bipotential gonads.
a) True
b) False

B