Unit 10 Mutations And Pedigrees Question Preview (ID: 50105)
Unit 10 Review For 9 Weeks Exam.
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Why does a DNA fingerprint help to identify a person?
a) Most genes are dominant.
b) Most people have DNA that contains repeats.
c) The most important genes are different among most people.
d) No two people, except identical twins, have exactly the same DNA.
Red-green color blindness is a sex-linked trait. Which of the following is not usually possible for red-green color blindness?
a) a carrier mother to pass the gene on to her daughter
b) a color blind father to pass the gene on to his daughter
c) a color blind father to pass the gene on to his son
d) a carrier mother to pass the gene on to her son
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 full symptoms of the disease.
b) The person will be a carrier of the disease.
c) The person will be unable to pass the disease on to offspring.
d) The person will have some symptoms of the disease, but they will not be as severe.
Why is color blindness more common in males than in females?
a) The allele for color blindness is recessive and located on the X chromosome.
b) Color blind males have two copies of the allele for color blindness.
c) The allele for color blindness is located on the Y chromosome.
d) Fathers pass the allele for color blindness to their sons only.
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 defective genet from the mother and a normal gene from the father.
c) He or she must get a normal gene from the mother and a defective gene from the father.
d) He or she must get a defective gene from both the mother and the father.
Down Syndrome is a a result of what type of mutation?
a) deletion
b) duplication
c) nondisjunction
d) translocation
A DNA segment in a somatic cell undergoes the mutation pictured below. What type of mutation is this? ATGCCATCCG to ATGCTATCCG
a) deletion
b) insertion
c) substitution
d) translocation
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 identical to the original organism.
c) The cloned individual is genetically different from the original organism.
d) The cloned individual is genetically transformed for the original organism.
Where are MOST sex-linked genes located?
a) on the X chromosome
b) on the Y chromosome
c) on the autosomes
d) on the dominant chromosome
Mutations can be caused by all of the following except
a) radiation
b) global warming
c) chemicals
d) viruses
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