BIOL 133 (4) Questions with CORRECT Answers
Question:
Both the X and Y chromosome can undergo inactivation. The presence of a functional
Y chromosome causes an individual to develop into a male.
Answer:
Both the X and Y chromosome can undergo inactivation.
Question:
He is XXY. His cells will have a Barr body He has a functional SRY gene.
Answer:
His cells will have a Barr body He has a functional SRY gene. He is heterozygous
for the coat color allele.
Question:
He is heterozygous for the coat color allele. He lacks the XIST gene.
Answer:
Incorrect: He lacks the XIST gene.
Question:
The patient will have hemophilia.
Answer:
tortoiseshell females; black males
Question:
SRY is a gene present on the X chromosome that triggers female development.
Answer:
SRY is an autosomal gene that is required for the expression of genes on the X
chromosome.
Question:
This person is most likely phenotypically female.
Answer:
This person will have 45 chromosomes in their body cells.
Question:
Both the X and Y chromosome can undergo inactivation. The presence of a functional
Y chromosome causes an individual to develop into a male.
Answer:
Both the X and Y chromosome can undergo inactivation.
Question:
He is XXY. His cells will have a Barr body He has a functional SRY gene.
Answer:
His cells will have a Barr body He has a functional SRY gene. He is heterozygous
for the coat color allele.
Question:
He is heterozygous for the coat color allele. He lacks the XIST gene.
Answer:
Incorrect: He lacks the XIST gene.
Question:
The patient will have hemophilia.
Answer:
tortoiseshell females; black males
Question:
SRY is a gene present on the X chromosome that triggers female development.
Answer:
SRY is an autosomal gene that is required for the expression of genes on the X
chromosome.
Question:
This person is most likely phenotypically female.
Answer:
This person will have 45 chromosomes in their body cells.
