Course

Genetics

Study Pack

Set 4 Sex Determination And Sex Chromosomes

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Question 1

(Multiple Choice)

Free
A human individual has a karyotype that is XY but is phenotypically female.An explanation for this could be

A) a deletion of the Sry gene on the Y chromosome, thus resulting in an female phenotype.
B) a translocation of the Sry gene to one of the X chromosomes has occurred, thus resulting in a female phenotype.
C) the Sry gene has been amplified 10 fold on the Y chromosome.
D) sex is determined by genes located on autosomes, not sex chromosomes.

Answer

Question 2

(Multiple Choice)

Free
What gene is most responsible for X-inactivation?

A) Xic
B) Xist
C) TsiX
D) Xce

Answer

Question 3

(Multiple Choice)

Free
In a Z-W system,which is considered to be the homogametic sex?

A) males
B) females

Answer