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Kardong 1e
An Introduction to Biological Evolution
Kenneth Kardong, Washington State University---Pullman
Variation: Spice of Life

Practice Quiz



1

Which of the following processes does not introduce genetic variation into a population?
A)recombination
B)mutation
C)mitosis
D)none of the above
2

When crossing over occurs, offspring can end up with different combinations of alleles on chromosomes than are found in either parent.
A)TRUE
B)FALSE
3

There is no genetic variation in populations of asexually reproducing organisms because offspring are clones of parents.
A)TRUE
B)FALSE
4

DeVries's elucidation of mutation theory was important to evolutionary biology because
A)it provided a more reasonable explanation for evolutionary change than Darwin's theory of natural selection.
B)it explained the source of genetic variation in populations.
C)its conclusions ran counter to those of Mendel.
D)it allowed selective breeding of the evening primrose.
5

Mutations are due to mistakes during DNA duplication.
A)TRUE
B)FALSE
6

Sickle-cell anemia is caused by
A)a nucleotide substitution that changes one amino acid in the hemoglobin molecule.
B)a nucleotide insertion that changes all the amino acids in the hemoglobin molecule downstream of the mutation.
C)a nucleotide deletion that has no effect on the amino-acid sequence of the hemoglobin molecule.
D)a translocation that moves the hemoglobin gene to a different chromosome.
7

Chromosomal inversions always have negative consequences for the organisms that carry them.
A)TRUE
B)FALSE
8

Polyploidy is a common mode of speciation in animals.
A)TRUE
B)FALSE
9

Polyploidy can occur when
A)a piece of DNA is flipped around within a chromosome.
B)a piece of DNA detaches from one chromosome and attaches to another.
C)an individual plant produces diploid gametes and then self-fertilizes.
D)a piece of DNA is deleted from a chromosome.
10

Homeotic mutations
A)occur in structural genes that control the formation of body parts.
B)occur in regulatory genes that control the expression of structural genes.
C)influence the development of body parts in fruit flies but not in vertebrates.
D)are universally responsible for setting up body polarity in animals.
11

A particular Hox gene can be turned on only once during an individual's development.
A)TRUE
B)FALSE
12

The spatial order of Hox genes within a cluster corresponds to the order along the body axis of the parts whose development they affect.
A)TRUE
B)FALSE
13

Which of the following statements is NOT true about the evolution of Hox genes?
A)Morphological differences between animal phyla are correlated with changes in Hox-gene number.
B)Evolution of Hox genes generally involves changes in mode of activation and response of target genes.
C)The nucleotide sequences of Hox genes are very similar among distantly related groups of organisms.
D)none of the above
14

The prevalence of adaptation in nature indicates that most mutations are advantageous.
A)TRUE
B)FALSE
15

Mutations that occur in the DNA of somatic cells are not passed on to offspring but can have phenotypic effects on the individual in which they arise.
A)TRUE
B)FALSE








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