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Unit 10 Mutations And Pedigrees
Test Description: Unit 10 Review for 9 weeks exam.
Instructions: Answer all questions to get your test result.
1) Where are MOST sex-linked genes located?
A
on the Y chromosome
B
on the autosomes
C
on the dominant chromosome
D
on the X chromosome
2) Mutations can be caused by all of the following except
A
viruses
B
global warming
C
radiation
D
chemicals
3) A DNA segment in a somatic cell undergoes the mutation pictured below. What type of mutation is this? ATGCCATCCG to ATGCTATCCG
A
insertion
B
substitution
C
translocation
D
deletion
4) How does a cloned individual compare to the original?
A
The cloned individual is genetically superior to the original organism.
B
The cloned individual is genetically transformed for the original organism.
C
The cloned individual is genetically identical to the original organism.
D
The cloned individual is genetically different from the original organism.
5) Down Syndrome is a a result of what type of mutation?
A
translocation
B
deletion
C
nondisjunction
D
duplication
6) Cystic fibrosis is a recessive genetic disorder that results from a defective gene on chromosome 7. For an individual to have symptoms of this disease, which of the following must be true?
A
He or she must get a defective gene from either the mother or the father but not from both.
B
He or she must get a normal gene from the mother and a defective gene from the father.
C
He or she must get a defective genet from the mother and a normal gene from the father.
D
He or she must get a defective gene from both the mother and the father.
7) PKU is a recessive genetic disorder. IF a person has one gene for PKU and one normal gene, which of the following will be true?
A
The person will have some symptoms of the disease, but they will not be as severe.
B
The person will be unable to pass the disease on to offspring.
C
The person will have full symptoms of the disease.
D
The person will be a carrier of the disease.
8) Why is color blindness more common in males than in females?
A
Fathers pass the allele for color blindness to their sons only.
B
Color blind males have two copies of the allele for color blindness.
C
The allele for color blindness is recessive and located on the X chromosome.
D
The allele for color blindness is located on the Y chromosome.
9) Red-green color blindness is a sex-linked trait. Which of the following is not usually possible for red-green color blindness?
A
a color blind father to pass the gene on to his daughter
B
a color blind father to pass the gene on to his son
C
a carrier mother to pass the gene on to her daughter
D
a carrier mother to pass the gene on to her son
10) Why does a DNA fingerprint help to identify a person?
A
No two people, except identical twins, have exactly the same DNA.
B
Most people have DNA that contains repeats.
C
Most genes are dominant.
D
The most important genes are different among most people.
*select an answer for all questions
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