AP Biology Chapter 15 Test with Questions Solved 100% Correct
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Course
AP Biology
Institution
AP Biology
The female werewolf must be heterozygous, because her father has round ears. Each of
her sons has a 50% chance of inheriting the round allele.
A woman is red-green color-blind. What can we conclude, if anything, about her father? (
Concept 15.2)
He is red-green color-blind.
There is a 50% prob...
AP Biology Chapter 15 Test with Questions
Solved 100% Correct
The female werewolf must be heterozygous, because her father has round ears. Each of
her sons has a 50% chance of inheriting the round allele.
A woman is red-green color-blind. What can we conclude, if anything, about her father? (
Concept 15.2)
He is red-green color-blind.
There is a 50% probability that he has normal vision.
We have too little information to tell.
He has two Y chromosomes.
none of the above - ✔He is red-green color-blind.
For the woman to be affected with this sex-linked recessive trait, she must be homozygous;
therefore, she must have received a recessive allele from her father. The father's single X must
have the recessive allele.
,A woman is a carrier for red-green color blindness, a sex-linked trait. Her husband is normal
(not color-blind) for this trait. What are the chances that their newborn daughter will be
red-green color-blind? (Concept 15.2)
75%
25%
50%
100%
0% - ✔0%
The daughter must receive one of her X chromosomes from her normal father and will not
be color-blind.
Duchenne muscular dystrophy is caused by a sex-linked recessive allele. Its victims are almost
invariably boys, who usually die before the age of 20. Why is this disorder almost never seen
in girls? (Concept 15.2)
The allele is carried on the Y chromosome.
To express an X-linked recessive allele, a female must have two copies of the allele.
Sex-linked traits are never seen in girls.
Nondisjunction occurs in males but not in females.
A sex-linked allele cannot be passed from mother to daughter. - ✔To express an X-
linked recessive allele, a female must have two copies of the allele.
Moreover, males carrying the allele have less of an opportunity to have offspring.
Hemophilia is a sex-linked disorder. The daughter of a father with hemophilia and a carrier
mother has a _____ probability of having hemophilia. ( Concept 15.2)
, 0%
33%
25%
50%
100% - ✔50%
The mother is XHXh, and the father is XhY. The daughter must receive Xh from the father and
has a 50% chance of receiving Xh from the mother.
Queen Victoria was a carrier of a recessive sex-linked allele for hemophilia. Which of the
following possibilities could explain the presence of the hemophilia allele in her genotype?
( Concept 15.2)
Either her mother was a carrier or her father had hemophilia.
Either her mother was homozygous dominant or her father had hemophilia.
Either her mother was a carrier or her father had a dominant allele.
Both her mother and her father had hemophilia.
none of the above - ✔Either her mother was a carrier or her father had hemophilia.
Queen Victoria must have had the hemophilia allele on one of her X chromosomes. Either her
mother was a carrier or her father was affected.
In a certain fish, fin rays (supporting structures for the fins) can be either bony or soft in adult
fish. Sex linkage in a fish is similar to that in humans. What evidence would most strongly
support the idea that the ray locus is on the X chromosome? ( Concept 15.2)
Females with bony rays cannot pass bony rays to female offspring even if they are mating
with a bony ray male.
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