Please answer the following questions. For a group of subpopulations of grizzly
ID: 168686 • Letter: P
Question
Please answer the following questions.
For a group of subpopulations of grizzly bears, an FST value of0.08 is calculated based on data from several microsatellite loci. From this value, provide an indirect estimate of the number of migrants that travel between the populations each generation. What assumptions are you making in inferring this estimate of the number of migrants per generation (hint: what is this method of estimation based on)? f the effective population size of each population is 000, what is the migration rate? The Boechera genus diverged from the well studied Arabidopsis genus recently. In a species of Boechera, populations contain both sexual individuals and individuals that reproduce by asexual seeds (embryos contain identical clones of the maternal parent and no meiosis occurs during their formation). All plants are diploid. The sexual plants have a selfing rate of 85%. In a genetic study, two important findings were presented: 1. Asexual plants have on average 50% higher observed heterozygosity than sexual plants. 2. When compared to the ancestral Arabidopsis DNA sequences, the asexual plants show more divergence than the sexuals. In other words, asexuals are less similar to the common ancestor than are sexual plants. In a brief paragraph, provide a plausible explanation for these findings relating them to what we've learned about inbreeding and mutation.Explanation / Answer
1. We know that
Fst= 1/4(Nm+1), where Nm is the number of migrants moving among populations each generation.
Now, Nm= (1/Fst)-1/4
=(1/0.08)-1/4
=12.5-1/4 =11.5/4 = 2.875.
The above inference was made based on the "island" model of poulstion structure,where it is assumed that replicate "island" population receive a constant m proportion of immigrants each generation.
Now,Nm= 2.875
Effective population N=1 (given), m is migration rate
Thus, 1* m =2.875 or m= 2.875