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The alleles are in disequilibrium because LD is > 0. One mechanism is that the two
allelic configurations are beneficial from a fitness perspective.
3. The effective population size of a diploid deer species is 20,000 individuals. All deer
have genotype X until a mutation (XY) occurs, giving one copy of Y in this individual,
so they are XY. Alleles confer equivalent fitness.
a. What is the probability that Y will be fixed?
Using the equation 1/(2N) = 1/(40,000) = 0.000025
b. How long will it take Y to become fixed on average (include units)?
Using the equation t=4N, it will take 80,000 generations.
c. The same mutation occurs in a haploid population of 3,000 deer. What is the
probability that Y will be fixed?
Use 1/(2N), but since the population is haploid, do not double the population size (so
1/N) = 1/3,000 = 0.00033
d. In the haploid population, how long will it take to fix Y on average (include units)?
Remember that in this particular example, this organism is haploid.
Use t=4N, but halve it because it is haploid = (2*3000) = 6000 generations (or years)
4. The Galapagos hawk has a polyandrous (one female, many male) mating system, in
which a single female controls a harem of males and is the sole mother of all babies in
that social group, which can contain up to 8 males, but there is only a single baby
produced in...
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This note was uploaded on 02/02/2014 for the course ECOL 335 taught by Professor Reinthal during the Spring '10 term at University of Arizona Tucson.
 Spring '10
 Reinthal
 Ecology, Sperm, Evolution, Mutation

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