QUIZ 4
1. What happens if a baby has only one X
chromosome, and no Y?
6. Which of the following lines of evidence support(s)
the idea that evolution occurs?
a. Such a major chromosome
deficiency is lethal, so the baby
would be stillborn.
b. This baby would be a female with
Turner syndrome.
c. The baby would be a male with
Turner syndrome.
d. The individual would have
Klinefelter syndrome.
a. the fossil record
b. genetic and biochemical
analyses
c. comparative anatomy and
embryology
d. artificial selection
e. all of the above
7. In what way does the human population influence
evolution?
2. Sex-linked disorders such as color blindness and
hemophilia are
a. Human development changes
the habitats of many species,
influencing natural selection on
those species.
b. Use of antibiotics by humans has
selected for antibiotic-resistant
bacterial populations.
c. Humans are responsible for the
many breeds of dogs found today.
d. all of the above
a. caused by genes on the X
chromosome
b. caused by genes on the
autosome
c. caused by genes on the Y
chromosome
d. expressed only in men
e. expressed only when two
chromosomes are homozygous
recessive
3. What are alleles?
a. specific physical locations of genes on a
chromosome
b. variations of the same gene (i.e., similar
nucleotide sequences on homologous
chromosomes)
c. homozygotes
d. heterozygotes
8. Natural selection acts on ____________________,
while evolution occurs in ________________.
a. populations; individual organisms
b. individual organisms, populations
c. species; individual organisms
d. ecosystems; organisms
9. Which of the following is a mechanism or cause of
evolution?
4. A single gene capable of influencing multiple
phenotypes within a single organism is said to be
__________.
a. mutation
b. gene flow
c. genetic drift
d. natural selection
e. all of the above
a. codominant for that gene
b. incompletely dominant for that
gene
c. polygenic for that gene
d. pleiotropic for that gene
10. Selection against individuals at both ends of a
phenotypic distribution for a character, favoring those
in the middle or average of the distribution, is an
example of __________.
5. Bat wings and bird wings are:
a. kin selection
b. sexual selection
c. directional selection
d. disruptive selection
e. stabilizing selection
a. completely unrelated.
b. analogous structures.
c. homologous structures.
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