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. autonomous 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. ZRY.

B. SYR.

C. CXY.

D. SRY.

E. PAR.

Question #3

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

A. Y and Z

B. A and B

C. Z and W

D. X and W

E. X and Y

Question #4

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

A. haplodiploidy.

B. chromosomal sex determination.

C. genic balance.

D. genic sex determination.

Question #5

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

A. homogametic.

B. hemigametic.

C. heterogametic.

D. spermatogametic.

Question #6

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

A. metafemale

B. female

C. male

D. metamale

E. intersex