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WorksheetsChapter 6 Quiz #1
Total questions: 10
Worksheet time: 7mins
Name
Class
Date
1.
In a pedigree, a round, shaded circle represents:
a)
a boy with a disorder
b)
a boy with no disorder
c)
a girl with a disorder
d)
a girl with no disorder
2.
In a pedigree, a boy that carries a disorder but does not have the disease is shown with:
a)
an "open" circle
b)
a half shaded circle
c)
a half shaded square
d)
a shaded square
3.
A pedigree can show sex-linked traits and autosomal (non-sex-linked) traits.
a)
True
b)
False
4.
Red-green colorblindness is a sex-linked trait. This means:
a)
the gene is on the X chromosome
b)
the gene is on the Y chromosome
c)
the gene is not associated with sex chromosomes
d)
the gene does not exist
5.
Calico color in cats is a sex-linked trait. If a calico female (genotype XBXW) mates with a black male (XBY), what are the chances of getting a black male kitten?
a)
50%
b)
25%
c)
0%
d)
100%
6.
Calico color in cats (genotype XBXW) is sex-linked. Can a male cat be a calico?
a)
Never because it is a recessive trait
b)
Yes because the gene is on the Y chromosome
c)
Never because the cat must have 2 X chromosomes
d)
Yes because the genes blend
7.
If a calico cat (XBXW) and a yellow tom cat (XWY) mate, what chance is there of a yellow male?
a)
0%
b)
25%
c)
50%
d)
75%
8.
XX represents a male human and XY represents a female.
a)
True
b)
False
9.
Cross a colorblind mom (XnXn) with a normal vision dad (XNY). What is the chance of a colorblind boy?
a)
0%
b)
100%
c)
75%
d)
50%
10.
A pedigree can always determine if someone has a disorder.
a)
True
b)
False
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