In humans, body size, muscle mass, and patterns of fat distribution are types of ____ sex characteristics
a. primary
b. secondary
c. tertiary
d. initial
e. mutable
b
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The restriction enzymes BamHI and BclI cut at the points indicated by arrows: If one sample of DNA was cut with BamHI and another with BclI, and these two samples were mixed and treated with DNA ligase, what would occur?
A) No DNAs would be ligated (joined together). B) Only the BamHI-cut DNA would be ligated. C) Only the BclI-cut DNA would be ligated. D) Both BamHI-cut and BclI-cut DNAs would be ligated, but only to DNA fragments cut with the same enzyme (for example, BamHI fragments would be ligated only to other BamHI fragments). E) Both BamHI-cut and BclI-cut DNAs would be ligated with no preference for which fragment is ligated to which other.
Red-green color blindness is an X-linked recessive trait in humans. A color-blind woman and a man
with normal vision have a son. What is the probability that the son is color-blind? a. 100 percent b. 75 percent c. 50 percent d. 25 percent e. 0 percent
When atoms react to form an ionic bond, electrons are shared between those atoms
__________________ Indicate whether the statement is true or false.
Which is an example of nonrandom mating?
a. Selecting a mate by their genotype b. Selecting a mate by their phenotype c. Selecting a mate by their species richness d. Selecting a mate by their family relationship e. Selecting a mate by their success of defeating another