Two organisms, AABBCCDDEE and aabbccddee, are mated to produce an F1 that is self-fertilized. If the capital letters represent dominant, independently assorting alleles. How many different genotypes will occur in the F2?
A) 243 B) 1024 C) 64 D) 32 E) 25
Answer: A
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Transcription of various genes under particular environmental conditions can be studied by
A) CARD-FISH. B) using a reporter gene that encodes for green fluorescent protein (GFP). C) T-RFLP. D) using a reporter gene that encodes for green fluorescent protein (GFP) or CARD-FISH.
Factors that affect the final amount of stored energy in an ecosystem include all of the following
EXCEPT a. the size of the producers. b. the availability of mineral nutrients. c. how much sunlight and rainfall are available during a growing season. d. the temperature range. e. the type of decomposers.
Which of the following statements best expresses the concept of punctuated equilibrium
A. Small variations gradually accumulate in evolving lineages over periods of millions of years B. Random mating ensures that the proportions of genotypes in a population remain unchanged from generation to generation C. Stability is achieved when selection favors the heterozygote, while both types of homozygotes are at a relative disadvantage D. Evolutionary changes consist of rapid bursts of speciation alternating with long periods which species remain essentially unmodified E. Under competition for identical resources, one of the two competing species will be eliminated or excluded
What organism would be most likely to exhibit a type III survivorship curve?
A. Gorilla B. Whale C. Coconut palm D. Pine tree E. Lion