1. A population of 100 slugs randomly mates except for 18 selfbreeding individuals. The population has a gene for darkmottling colour, M, which produces dark individuals when ahomozygous MM condition exists, and green individuals when ahomozygous M’M’ condition exists. Heterozygotes are mottled. What is the proportion (genotypic frequency) of the dark, mottled,and green slugs in the succeeding generation of thispopulation? The initial allele frequency of M is 0.7 and ofM' is 0.3.

b) Not all populations experience equal amounts of geneticdrift or non-random mating. Evolutionary biologists use theeffective population size, Ne, to estimate the size ofan ideal population that would undergo the same amount ofgenetic drift or show effects of non-random mating as theactual population. Smaller populations have more drift. The value of Ne can be determined from:

Ne = 4 NmNf / Nm +Nf

Where Nm is the number of males in the actual population andNf is the number of females.

If one population of elkhas 2 males and a harem of 6 females and another population in thesame

region has 1 male and 11females. Which population is more likely to experiencegenetic drift? Why?

(keywords to look up: Sewall Wright, effective population size, andFisherian ratio)

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Jamar Ferry
Jamar FerryLv2
28 Sep 2019

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