During genetic drift the gene frequencies of a population will change ________
a. back and forth and eventually stabilize
b. in a random direction based upon chance
c. in a random direction based upon the predators faced by the population
d. in a predictable direction based upon the number of females in the population
e. in a predictable direction based upon the number of males in the population
b
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When atmospheric CO2 concentrations decrease, the ________ cycle gives C4 plants an advantage over C3 in carbon fixation
Fill in the blank with correct word.
Synaptonemal complex forms during
A) leptonema. B) zygonema. C) pachynema. D) diplonema. E) diakinesis.
Which of the following techniques would be most appropriate to test the hypothesis that humans and chimps differ in the expression of a large set of shared genes?
A) DNA microarray analysis B) polymerase chain reactin (PCR) C) DNA sequencing D) protein-protein interaction assays
The __________ is the outermost extraembryonic membrane of the amniotic egg.
a. chorion b. allantois c. amnion d. yolk sac e. shell