Biology 251 - Genetics » Spring 2021 » Topic 4.1 Quiz

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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

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