What are the three major factors allele frequencies and bring out about most evolutionary change? correct answers Natural selection, genetic drift, and gene flow
Describe natural selection correct answers differential success in reproduction results in certain alleles being passed to the next ge...
Biol 240 SFSU Spring Exam 1 || ALREADY PASSED!!
What are the three major factors allele frequencies and bring out about most evolutionary
change? correct answers Natural selection, genetic drift, and gene flow
Describe natural selection correct answers differential success in reproduction results in
certain alleles being passed to the next generation in heater proportions. This is not a random
process. Increases the frequencies of alleles that enhance survival and reproduction.
Describe some evolution situation that occur due to random chance correct answers genetic
drift& gene flow. They do no consistently lead to adaptations
Describe genetic drift correct answers how alleles frequencies fluctuate unpredictably from
one generation to the next
What is this describing? " The smaller a sample, the greater the chance of divination from a
predicted result? correct answers genetic drift
When does the "founder effect" occur correct answers the founder effect occurs when a few
individuals become isolated from a larger population
Ellis-van Creveld syndrome, where the autosomal recessive condition resulting in
polydactyly, heart defects and dwarfism which has been a higher risk in the amish
community is an example of correct answers founder effect
Describe the bottleneck effect correct answers a sudden reduction in population size due to a
change in the environment
After a bottleneck effect, will the resulting gene pool may be reflective of the original
population's gene pool correct answers False, after a bottleneck effect, the resulting gene pool
may no longer be reflective of the original population's gene pool.
Will alleles in surviving population be at a much higher frequency than before bottleneck
effect correct answers yes, it may
In 1862 US invades SW and reduces Navajo population. Only 2000 individuals of
reproductive age survive, from whom all 250,000 Navajos living today are descended, this is
an example of correct answers bottleneck effect
Describe gene flow correct answers is a change in the allele frequency due to transfer of
alleles into or out of the pool
Natural selection brings about adaptive evolution by acting on an organism's what? correct
answers Phenotype
What does fitness indicates? correct answers Fitness indicates an organism's ability to pass its
genes into the next generation
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