Practice Quiz for Mutation

No. of Questions= 6
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1 The ultimate source of new genetic variation in a species is:
a) mutation
b) the combination of parental chromosomes during sexual reproduction
c) the Hardy-Weinberg equation
2 Which of the following statements is true about mutations?
a) They can produce new alleles of existing genes.
b) They can be inherited if they are in somatic cells.
c) They are never as simple as an error in a single codon in a DNA molecule.
d) A and B
3 New Human mutations typically occur at a rate of about __________ per individual among normal, healthy people.
a) 2-3
b) 1,000-2,000
c) 0
4 It is now known that mutations can be caused by all of the following except:
a) radiation
b) some chemicals
c) incest (i.e., mating with close relatives)
d) some microorganisms
5 Most known human mutations:
a) are caused by radiation
b) appear to be spontaneous
c) are due to viruses
6 In order for a mutation to be selected for or against by natural selection, ordinarily it must:
a) be a gross chromosomal rearrangement or an irregular number of chromosomes
b) occur in the genotype
c) be expressed in the phenotype



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