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WorksheetsSex Linked Inheritance
Total questions: 13
Worksheet time: 11mins
Name
Class
Date
1.
What percentage of the offspring will have this recessive disease?
a)
0%
b)
25%
c)
50%
d)
75%
2.
What percentage of the female offspring will be a carrier for this recessive disease?
a)
0%
b)
50%
c)
100%
d)
25%
3.
How many PAIRS of chromosomes do humans have?
a)
23
b)
46
c)
1
d)
2
4.
How many PAIRS of sex chromosomes do humans have?
a)
23
b)
46
c)
1
d)
2
5.
I have 2 X chromosomes. What am I?
a)
Male
b)
Female
6.
I have 1 X chromosome and 1 Y chromosome. What am I?
a)
Male
b)
Female
7.
If a gene is found only on the X chromosome and not the Y chromosome, it is said to be what?
a)
sex-linked trait
b)
polygenic trait
c)
codominant trait
d)
incomplete dominance trait
8.
Hemophilia is a recessive x-linked disorder.
Which genotype represents a female who is a carrier for hemophilia?
Which genotype represents a female who is a carrier for hemophilia?
a)
XHXh
b)
XhXh
c)
XHXH
d)
XhY
9.
Hemophilia is a recessive x-linked disorder.
Which genotype represents a male with hemophilia?
Which genotype represents a male with hemophilia?
a)
XHXh
b)
XhXh
c)
XHY
d)
XhY
10.
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
11.
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
12.
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%
13.
Look at this cross: XBXb x XBY
What proportion of the male children are colorblind?
a)
100%
b)
75%
c)
50%
d)
25%
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