Which of the following is TRUE about group selection?
a) It is a common occurrence in large populations.
b) It is at least as common as reciprocal altruism.
c) It leads to unselfish individual behavior that benefits the population or species.
d) It tends to increase altruistic behavior.
e) It becomes progressively more common over several generations.
Ans: c) It leads to unselfish individual behavior that benefits the population or species.
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Which of the following is true in the moss life cycle?
a. Gametophytes originate within and are dependent upon sporophytes. b. Sporophytes originate within and are dependent upon gametophytes. c. Both gametophytes and sporophytes are totally independent from each other and are equally dominant. d. Gametophytes are free-living and photosynthetic, but are replaced by a dominant sporophyte generation. e. Gametophytes are photosynthetic and partially independent from the sporophytes.
If a population has an allele frequency of 1.0, you would say that
A) the allele frequency is ideal. B) genetic variation of that allele is low. C) genetic variation of that allele is high. D) that allele is under selection.
The process of morphogenesis in development begins ________ after fertilization
A) 12 weeks B) immediately C) 3 weeks D) 20 weeks
Why can the two-locus segregation distorter system in Drosophila exist only when distorter and responder gene are tightly linked?
a. The sensitive allele of the responder gene and the segregation distorter driver allele must al-ways co-occur on the same chromosome. b. Without tight linkage, the "killing" efficiency of the driver allele would be too low. c. The driver allele would reduce its own fitness by committing suicide in some gametes. d. All of the above.