A "point mutation" refers to mutations involving
A) a base-pair substitution.
B) the gain of a base pair (microinsertion).
C) the deletion of a base pair (microdeletion).
D) a substitution, deletion, or addition of one base-pair.
Answer: D
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In what phase of the cell cycle does a typical cell spend most of its life?
a. interphase b. prophase c. metaphase d. anaphase e. telophase
Fitness refers to
A. physical health of an individual. B. physical health of a population. C. reproductive success D. variation in traits within the population E. Mutations that benefit an organism's survival
An individual that has two dominant alleles for a trait (AA) is called __________.
Fill in the blank(s) with the appropriate word(s).
As cleavage continues, a zygote forms into a solid multicellular ball called a(n)
A) endometrium. B) morula. C) trophoblast. D) gastrula. E) blastula.