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WorksheetsLinkage
Total questions: 22
Worksheet time: 4hrs 49mins
Name
Class
Date
1.
What is the map distance if the following offspring are produced: 345 wild, 8 wild/yellow, 10 vestigial/wild, 325 yellow/vestigial? (note: these are not given as percents!)
a)
97.3
b)
2.6
c)
18
d)
1.8
2.
1 map unit is equal to:
a)
1 nm
b)
1% recombination
c)
1 chromosome
d)
1 mutation
3.
What determines gender in humans?
a)
the X and Y chromosome
b)
chromosome 21
c)
x chromosome
d)
y chromosome
4.
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? Make a punnett square!
a)
All sons will have hemophilia
b)
all daughters will have hemophilia
c)
50% of daughters and 50% of sons have hemophilia
d)
100% of sons have hemophilia and 100% of daughters are carriers
5.
Alleles that are inherited on the X or Y chromosomes:
a)
multiple alleles
b)
sex-linked genes
c)
codominance
d)
polygenic inheritance
6.
Hemophilia is an x-linked trait. A normal man marries a woman that is a carrier. What are their chances of having a child with the disorder?
a)
O%
b)
50%
c)
25%
d)
100%
7.
According to _______, genes that are closer together on a chromosome, have a higher chance of being inherited together.
a)
Gene Linkage
b)
Polygenic
c)
Pleiotropy
d)
Epistasis
8.
A and B are linked genes. In a study of 100 offspring, 80 parental genotypes for A and B, while 20 were recombinants. A and B are how many map units apart?
a)
10
b)
5
c)
20
d)
30
9.
X-inactivation balances the inequality of genes between males and females.
a)
True
b)
False
10.
What type of heredity is shown in the pedigree?
a)
Sex-Linked Dominant
b)
Sex-Linked Recessive
c)
Autosomal Dominant
d)
Autosomal Recessive
11.
Causes genes to not segregate independently. Causes genes to be more likely to be inherited together. Represents an exception to Mendel's Law of Independent assortment.
a)
Gene linkage
b)
Epistasis
c)
Polygenic traits
d)
Codominance
12.
the new combination of genes produced by crossing over and independent assortment.
a)
genetic recombination
b)
polygenic trait
c)
epistasis
d)
gene linkage
13.
The following are results of crossing a female fly (AaBb) with a male fly (aabb).
AaBb 1005
aabb 1000
Aabb 200
aaBb 210
Which two genotypes are the recombinant offspring?
AaBb 1005
aabb 1000
Aabb 200
aaBb 210
Which two genotypes are the recombinant offspring?
a)
AaBb & Aabb
b)
AaBb & aaBb
c)
Aabb & aaBb
d)
AaBb & aabb
14.
A drawing that shows the sequence of genes on a chromosome and can be created using data collected about crossing-over.
a)
chromosome mapping
b)
gene linkage
c)
karyotype
15.
Which of the following chromosomes are in CIS configuration?
a)
A-------b
b------A
b------A
b)
A-------B
a--------b
a--------b
16.
A dog gives birth to 5 puppies. What percentage of the chromosomes does each puppy share with the mother?
a)
25%
b)
50%
c)
75%
d)
100%
17.
Genes that are closer to each other on a chromosome will have a higher recombination rate.
a)
True
b)
False
18.
Which best describes the process shown?
a)
mutation in which the DNA content of the gene is ltered
b)
segregation of sister chromatids
c)
condensation and segregation of the alleles
d)
crossing-over which alleles are exchanged
19.
If a male has an affected x chromosome for a sex-linked trait such as colorblindness, where did he get the chromosome from?
a)
His father
b)
His mother
20.
True or False: Men can NEVER be "carriers" for recessive sex-linked traits because they only have one X chromosome.
a)
True
b)
False
21.
A gene on the Y chromosome that determines maleness is called:
a)
AB
b)
SRY
c)
ABC
d)
Barr Body
22.
Beard growth and milk production are examples of traits that are:
a)
Sex-inactivated
b)
Sex- influenced
c)
Sex- limited
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