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. pseudoautosomal regions.

B. parahomologous regions.

C. autosomal regions.

D. pseudoautonomous 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. SRY.

B. CXY.

C. ZRY.

D. SYR.

E. PAR.

Question #3

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

A. Z and W

B. A and B

C. Y and Z

D. X and Y

E. X 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. heterogametic.

B. spermatogametic.

C. hemigametic.

D. homogametic.

Question #6

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

A. male

B. metafemale

C. female

D. intersex

E. metamale