and freq(B) = cenario 2. Now pretend the predatory fish was not introduced. The population is 20,0 .5. There are not observable differences in the survival or reproductive success of individuals that is elated to their spots. A drought drastically reduces the size of the pond, and the population drops to 100 dividuals. Twenty years after the drought, the frequency of B is 1.0. A. After the drought, the Rallele was ( fixed / lost ). B. Which evolutionary force best explains the change in the frequency of R in Scenario 2? Explain your choice. a. Natural selection b. Genetic drift c. Gene Flow d. Mutation e. Non-random Mating
and freq(B) = cenario 2. Now pretend the predatory fish was not introduced. The population is 20,0 .5. There are not observable differences in the survival or reproductive success of individuals that is elated to their spots. A drought drastically reduces the size of the pond, and the population drops to 100 dividuals. Twenty years after the drought, the frequency of B is 1.0. A. After the drought, the Rallele was ( fixed / lost ). B. Which evolutionary force best explains the change in the frequency of R in Scenario 2? Explain your choice. a. Natural selection b. Genetic drift c. Gene Flow d. Mutation e. Non-random Mating
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Answer part B using scenario 2
Transcribed Image Text:Scenario 2. Now pretend the predatory fish was not introduced. The population is 20,000 and freq(B) =
0.5. There are not observable differences in the survival or reproductive success of individuals that is
related to their spots. A drought drastically reduces the size of the pond, and the population drops to 100
individuals. Twenty years after the drought, the frequency of B is 1.0.
A. After the drought, the R allele was ( fixed / lost ).
B. Which evolutionary force best explains the change in the frequency of R in Scenario 2? Explain
your choice.
a. Natural selection
b. Genetic drift
c. Gene Flow
d. Mutation
e. Non-random Mating
c. What are two (2) different ways that the population could re-gain variation for this gene?
Expert Solution
Step 1
As in Hardy Weinberg rule
p2+q2+2pq=1 and p+q=1
where
p = frequency of the dominant allele in the population
q = frequency of the recessive allele in the population
p2 = percentage of homozygous dominant individuals
q2 = percentage of homozygous recessive individuals
2pq = percentage of heterozygous individuals
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