AnswersFL-2000310-Biology 1 Sem 1 - FlexSex-linked Inheritance

Sex-linked Inheritance Answers

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Hemophilia is an X-linked recessive disorder (Xh) that is passed through generations and can be traced by using a pedigree. Based on the pedigree, if Charles and Marie have a daughter in the future, what is the probability that she will have hemophilia?

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A
0 percent
B
25 percent
C
50 percent
D
100 percent
2
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Which allele combination represents a female who is heterozygous for a sex-linked trait?

A
XRY
B
XrY
C
XRXr
D
XRXR
3

Hemophilia is an X-linked recessive disorder. What is the probability of the offspring having hemophilia for the cross that is shown in the Punnett square?

Question illustration
A
0 percent
B
25 percent
C
50 percent
D
75 percent
4

Duchenne muscular dystrophy is an X-linked recessive disorder. What is the probability that a female offspring of the cross that is shown above would have a recessive allele for Duchenne muscular dystrophy disorder?

Question illustration
A
0 percent
B
25 percent
C
50 percent
D
100 percent
5

Which is not considered a sex-linked trait?

A
purple flower color in pea plants
B
eye color in fruit flies
C
red-green color blindness in humans
D
hemophilia in humans
6

Error

Question illustration
Answer not available
7

Which statement about inheritance is true?

A
Girls get most of their traits from their moms; boys get most of their traits from their dads.
B
Male offspring will always have an X-linked genetic disease if the mom is a carrier.
C
Fathers always determine the gender of the offspring in humans.
D
Males never have Y chromosomes.
8

Which pedigree symbol is used to represent a female carrier of a recessive X-linked trait?

A
An empty circle.
Option A
B
A half-filled circle.
Option B
C
An empty square.
Option C
D
A filled square.
Option D
9

How are the alleles for sex-linked traits inherited?

A
They are passed from the Y chromosome in parents to the X chromosome in offspring.
B
They are passed from the X chromosome in parents to the XY chromosome in offspring.
C
They are passed from parents to offspring on the X and Y chromosomes.
D
They are passed from any chromosome in the parents to the X or Y chromosome in the offspring.
10

What was Thomas Hunt Morgan's main contribution to science?

A
He discovered that certain traits were linked to the X chromosome.
B
He was the first to use fruit flies in research.
C
He created the first white-eyed female Drosophila.
D
He created the first white-eyed male Drosophila.

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