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. pseudoautosomal regions.

C. autonomous regions.

D. autosomal regions.

E. pseudoautonomous regions.

Question #2

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

A. SYR.

B. SRY.

C. CXY.

D. ZRY.

E. PAR.

Question #3

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

A. Z and W

B. X and Y

C. A and B

D. Y and Z

E. X and W

Question #4

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

A. chromosomal sex determination.

B. haplodiploidy.

C. genic sex determination.

D. genic balance.

Question #5

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

A. heterogametic.

B. hemigametic.

C. homogametic.

D. spermatogametic.

Question #6

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

A. female

B. male

C. metamale

D. intersex

E. metafemale