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

Sex-linked Inheritance Answers

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1
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What is genotype for a recessive trait found on the female chromosome?

A
Yh
B
Xh
C
XH
D
YH
2
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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
3

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.
4

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.
5

Hemophilia is an X-linked recessive disorder (Xh) that is passed through generations and can be traced by using a pedigree. What is the probability that a female child of Charles and Marie would suffer from hemophilia?

Question illustration
A
0 percent
B
25 percent
C
50 percent
D
100 percent
6

Which allele combination represents a female who is heterozygous for a sex-linked trait?

A
XRY
B
XrY
C
XRXr
D
XRXR
7

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 that is shown, which describes John?

Question illustration
A
carrier for hemophilia
B
expresses hemophilia
C
does not have hemophilia
D
expresses hemophilia and died of complications
8

Which statement is always true when describing sex-linked inheritance?

A
It results in a dominant trait.
B
The alleles are found on the X or Y chromosome.
C
The resulting trait is influenced by multiple alleles.
D
It is affected by alleles on at least three different chromosomes.
9

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
10

Which allele combination represents a female who is a carrier for an X-linked recessive disorder?

A
XRXr
B
XrXr
C
XRY
D
XrY

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