wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Sex Linked Traits

Total questions: 55

Worksheet time: 14hrs 45mins

Name
Class
Date
1.

In fruit flies, eye color is a sex linked trait. Red (R) is dominant to white (r). What is the sex and eye color of flies with the following genotype: X R X r ?

a)

male with white eyes

b)

female with red eyes

c)

male with red eyes

d)

female with white eyes

2.

In fruit flies, eye color is a sex linked trait. Red (R) is dominant to white (r). What is the sex and eye color of flies with the following genotype: X R Y ?

a)

male with white eyes

b)

female with white eyes

c)

male with red eyes

d)

female with red eyes

3.

In fruit flies, eye color is a sex linked trait. Red is dominant to white. What is the sex and eye color of flies with the following genotype: X R X R ?

a)

male with red eyes

b)

female with red eyes

c)

male with white eyes

d)

female with white eyes

4.

In fruit flies, eye color is a sex linked trait. Red (R) is dominant to white (r). What is the sex and eye color of flies with the following genotype: X r Y ?

a)

male with red eyes

b)

female with red eyes

c)

male with white eyes

d)

female with white eyes

5.

What are the genotypes of these flies:


white eyed, male ?

a)

X R X r

b)

X R X R

c)

Xr X r

d)

X r Y

e)

XR Y

6.

What are the genotypes of these flies:


white eyed, female ?

a)

X R X r

b)

X R X R

c)

Xr X r

d)

X r Y

e)

X R Y

7.

What are the genotypes of these flies:


red eyed female (heterozygous) ?

a)

X R X r

b)

X R X R

c)

Xr X r

d)

X r Y

e)

X R Y

8.

What are the genotypes of these flies:


red eyed, male ?

a)

X R X r

b)

X R X R

c)

Xr X r

d)

X r Y

e)

X R Y

9.

In a cross between a pure red eyed female and a white eyed male, what would the genotypes of the parents be?

a)

XRXr with XR Y

b)

XRXr with Xr Y

c)

XRXR with XR Y

d)

XRXR with Xr Y

e)

XrXr with Xr Y

10.
The sex of a child is determined by
a)
whether the father's sperm contains an x or y chromosome
b)
whether the mother's egg contains an x or y chromosome
c)
the age of the parents
11.
Why is the gene for a disease or disorder more likely to be found on the X chromosome than Y?
a)
The X chromosome has many more genes
b)
The Y chromosome has many more genes
12.
Males are more likely to suffer from a sex-linked disease or disorder because
a)
males are the weaker sex
b)
males have less DNA
c)
males have 1 X chromosome, so the disorder is more likely to be expressed
13.
When we say that a woman is a carrier for a genetic disease or disorder it means that
a)
she has 1 gene, but not the disorder
b)
she has 2 genes for the disorder
c)
she can pass the gene only to male children
d)
she can pass the gene only to female children
14.
Why are men 16 times more likely to be color-blind than women?
a)
to be color-blind, you must have a Y chromosome
b)
to be color-blind, all of your X chromosomes must have the gene
c)
color-blindness is caused by testosterone
d)
color-blindness is caused by the same gene as baldness
15.
If a gene is found only on the X chromosome and not the Y chromosome, it is said to be 
a)
sex-linked trait
b)
polygenic trait
c)
codominant trait
d)
incomplete dominance trait
16.
Hemophilia is a recessive x-linked disorder.
Which genotype represents a female who is a carrier for hemophilia?
a)
XHXh
b)
XhXh
c)
XHXH
d)
XhY
17.
Hemophilia is a recessive x-linked disorder.
Which genotype represents a male with hemophilia?
a)
XHXh
b)
XhXh
c)
XHY
d)
XhY
18.

Which chromosome contains more genes?

a)

The X chromosome

b)

The Y chromosome

c)

They are homologous, so they contain the same amount of genes.

19.

Males can be heterozygous for sex-linked traits.

a)

True

b)

False

20.

What would the genotype be of a colorblind male?

a)

XNY

b)

XNYn

c)

XnY

d)

XnYn

21.

How many recessive genes does a carrier female have for colorblindness?

a)

1

b)

2

c)

0

22.

Muscular dystrophy is a sex-linked recessive disorder. A man with muscular dystrophy marries a woman who doesn’t have this disease. Half of their daughters and half of their sons develop this disease. What is the genotype of the mother?

a)

XNXN

b)

XNXn

c)

Xn

d)

XN

23.

A boy whose parents have normal vision is colorblind. What are the genotypes for his mother and father? Use XN for normal vision and Xn for colorblindness. Show the Punnett square to support your answer.

a)

XbY

b)

XBY

c)

XBXB

d)

XBXb

e)

XbXb

24.

A woman who is colorblind has a mother with normal vision. Knowing that colorblindness is a sex-linked recessive gene, what is her mother’s genotype? What is her father’s genotype? Use XN for normal vision and Xn for colorblindness.

a)

XNXN

b)

XnY

c)

XNXn

d)

XnXn

e)

XNY

25.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
26.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
27.

Which sex chromosomes do females have?

a)

XX

b)

XY

28.

Which sex chromosomes do males have?

a)

XX

b)

XY

29.

X-Linked traits are more common in

a)

males

b)

females

30.

Which allele codes for an X-Linked recessive trait?

a)

XT

b)

Xt

c)

YT

d)

Yt

31.

Which allele does not code for an X-linked (dominant OR recessive) trait?

a)

XT

b)

Xt

c)

Y

32.

Look at this cross: XB XB x Xb Y

What proportion/percent of the male children are colorblind?

a)

100%

b)

75%

c)

25%

d)

0%

33.

Look at this cross: XBXb x XBY


What proportion of the male children are colorblind?

a)

100%

b)

75%

c)

50%

d)

25%

34.

H= normal blood clotting

h=hemophilia


XHXh x XHY


What is the probability that any of their offspring will have hemophilia?

a)

4/4

b)

3/4

c)

2/4

d)

1/4

35.

The bison herd on Konza Prairie has a sex-linked trait known as “rabbit hock” in which the knee of the back leg is slightly malformed. A male bull that is normal mates with a cow that is a carrier for rabbit hock. Of the female offspring, what percent would be carriers?

a)

0%

b)

25%

c)

50%

d)

100%

36.

The woman who is colorblind marries a man with normal vision. What is the probability that their sons will be colorblind?

a)

0%

b)

25%

c)

50%

d)

100%

37.

H= normal blood clotting

h=hemophilia


parent 1: XHXh parent 2: XHY


What is the probability that any of their offspring will have hemophilia?

a)

4/4

b)

3/4

c)

2/4

d)

1/4

38.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
39.
I have 2 X chromosomes. What am I?
a)
Male
b)
Female
40.
I have 1 X chromosome and 1 Y chromosome. What am I?
a)
Male
b)
Female
41.
Which of the following genotypes belongs in the red box in the Punnett square?
a)
XBXb
b)
XbXb
c)
XbY
d)
XBY
42.
Duchenne muscular dystrophy is a recessive x-linked disorder.
According to the Punnett square, what percentage of male offspring will have the disorder?
a)
0%
b)
25%
c)
50%
d)
100%
43.
Based on the following Punnett square, what percentage of the offspring will have this recessive disease?
a)
0%
b)
25%
c)
50%
d)
75%
44.

Which of the following best defines an autosome?

a)

A chromosome that does things automatically

b)

A chromosome that is least common in a human set of chromosomes

c)

A non-sex chromosome

d)

A sex-determining chromosome

45.

The reason why sex chromosomes have they name they do is because they

a)

Are not autosomes

b)

Are unique in how they look

c)

Are not able to be paired with any other chromosomes

d)

Determine the sex for the organism

46.
If this couple has a child, what are the odds that a SON will be colorblind (hint: has a little "c")?
a)
50%
b)
25%
c)
100%
d)
75%
47.
Hemophilia is recessive diseases carried on the X chromosome. Can a male be a carrier of the disease?
a)
Yes
b)
No
c)
Maybe
48.
In fruit flies, red eye color (R) is a sex-linked trait that is dominant over white eye color (r).
According to the Punnett square, what percentage of female offspring will have red eyes?
a)
75%
b)
25%
c)
0%
d)
100%
49.
If a woman is a carrier for a sex linked recessive trait of hemophilia and her husband has hemophilia, which of the following is true?
a)
All sons will have hemophilia
b)
All daughters will have hemophilia
c)
50% of daughters and 50% of sons have hemophilia
d)
0% of sons have hemophilia but 100% of daughters are carriers
50.

What must occur for a girl to be colorblind?

a)

each parent must be colorblind

b)

each parent must have the dominant allele for colorblindness

c)

each parent must have the recessive allele for colorblindness

d)

her father must have normal vision

51.

When a woman, heterozygous for normal vision, mates with a colorblind male, what percentage of their offspring could be colorblind?

a)

25%

b)

50%

c)

75%

d)

0%, but all would be carriers.

52.

A human male will normally transmit the genes

on his X chromosome to

a)

his sons

b)

his daughters

c)

half of his sons and half of his daughters

d)

all of his children

53.

If a gene is found on the X or Y chromosome, it is said to be what?

a)

a sex-linked trait

b)

a polygenic trait

c)

a codominant trait

d)

an incomplete dominance trait

54.

Hemophilia is a recessive X-linked condition. Is it possible for a normal male and normal female to have a child with hemophilia?

a)

No, at least one parent must have hemophilia in order to pass down the disorder

b)

No, both parents must have hemophilia in order to pass down the disorder

c)

Yes, the mother could be a carrier and pass down hemophilia to her daughters

d)

Yes, the mother could be carrier and pass down hemophilia to her sons

55.
Colorblindness is an X-linked disorder. Can a male ever be a carrier for this disorder?
a)
Yes
b)
No

Similar Resources on Wayground

Moon Phases, Tides, & Eclipses

50 questions

Moon Phases, Tides, & Eclipses

quiz

Worksheet

•

9th - 12th Grade

Mitosis Meiosis Test Review

60 questions

Mitosis Meiosis Test Review

quiz

Worksheet

•

5th - 11th Grade

Soal Asesmen Sumatif Akhir Tahun PIPAS 2025

50 questions

Soal Asesmen Sumatif Akhir Tahun PIPAS 2025

quiz

Worksheet

•

10th Grade

Cultura general

50 questions

Cultura general

quiz

Worksheet

•

8th - 9th Grade

Space So Far Review....

55 questions

Space So Far Review....

quiz

Worksheet

•

9th Grade

Motion Test Review- IPC

60 questions

Motion Test Review- IPC

quiz

Worksheet

•

8th - 11th Grade

4.5 Mutations 2023

58 questions

4.5 Mutations 2023

quiz

Worksheet

•

9th Grade

ESPERANTZARA KONDENATUAK_EDUKIEN EBALUAZIOA

50 questions

ESPERANTZARA KONDENATUAK_EDUKIEN EBALUAZIOA

quiz

Worksheet

•

9th Grade