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. parahomologous regions.

B. autosomal regions.

C. pseudoautonomous regions.

D. pseudoautosomal regions.

E. autonomous regions.

Question #2

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

A. CXY.

B. ZRY.

C. SRY.

D. SYR.

E. PAR.

Question #3

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

A. X and Y

B. Y and Z

C. X and W

D. A and B

E. Z and W

Question #4

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

A. genic sex determination.

B. haplodiploidy.

C. chromosomal sex determination.

D. genic balance.

Question #5

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

A. hemigametic.

B. homogametic.

C. spermatogametic.

D. heterogametic.

Question #6

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

A. intersex

B. metafemale

C. metamale

D. female

E. male