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. pseudoautosomal regions.

C. parahomologous regions.

D. autonomous regions.

E. autosomal regions.

Question #2

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

A. ZRY.

B. SYR.

C. CXY.

D. SRY.

E. PAR.

Question #3

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

A. X and Y

B. A and B

C. X and W

D. Z and W

E. Y and Z

Question #4

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

A. genic sex determination.

B. genic balance.

C. chromosomal sex determination.

D. haplodiploidy.

Question #5

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

A. spermatogametic.

B. homogametic.

C. hemigametic.

D. heterogametic.

Question #6

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

A. metamale

B. male

C. intersex

D. female

E. metafemale