From an evolutionary perspective, germ-line mutations are more significant than somatic mutations. This is because:
A. somatic mutations affect only one or a few
cells.
B. somatic mutations are generally harmful.
C. only germ-line mutations will appear in an
individual's descendants.
D. only germ-line mutations are potentially
beneficial.
E. somatic mutations affect only one or a few
cells and only germ-line mutations will appear
in an individual's descendants.
Answer Point Value: 1.0 points
Answer Key: C
5
Remember that, in Mendel's garden peas, the yellow gene determines flower color, with the
A (yellow) allele dominant to the a (green) allele. In a population of 200 plants, the genotype
frequencies are 50% AA, 25% Aa, and 25% aa. What are the allele frequencies?
A. 50% A, 50% a
B. 50% A, 25% a
C. 87.5% A, 12.5% a
D. 62.5% A, 37.5% a
E. 75% A, 25% a
D
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a. xylem; phloem b. phloem; xylem c. parenchyma cells; sclerenchyma cells d. sclerenchyma cells; parenchyma cells e. vessel elements; sieve elements
In Arabidopsis, the monopteros gene regulates:a
positional effects in leaves.
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Fill in the blank(s) with the appropriate word(s).