California State University, Fullerton » Biology » Biology 251 - Genetics » Spring 2021

Question #1

In mammals, the sex chromosome regions that that are homologous for pairing in meiosis are called the:

A. pseudoautonomous regions.

B. autonomous regions.

C. autosomal regions.

D. parahomologous regions.

E. pseudoautosomal regions.

Question #2

A gene on the Y chromosome that encodes a transcription factor that determines male sex characteristic development is called:

A. PAR.

B. ZRY.

C. CXY.

D. SYR.

E. SRY.

Question #3

Birds and reptiles have the _________ sex chromosomes for biological sex determination.

A. X and Y

B. Y and Z

C. A and B

D. Z and W

E. X and W

Question #4

Development of male and female reproductive organs in plants is determined by the mechanism of:

A. genic balance.

B. chromosomal sex determination.

C. haplodiploidy.

D. genic sex determination.

Question #5

The chromosome composition for sex determination in mammals means that males are the _____ sex.

A. spermatogametic.

B. homogametic.

C. heterogametic.

D. hemigametic.

Question #6

A fruit fly with two sets of autosomal chromosomes and one X sex chromosome would be ___.

A. male

B. intersex

C. female

D. metafemale

E. metamale