Readings 8 notes

41 views2 pages
11 Aug 2010
School
Course
Readings 8
Pg223-228
-when an ideal population has no mutation, no migration and infinitely large size as well as
v}uu]vPUZooo(µv]}v[ZvPvZPv}Ç(µv]v
calculated
-migration is the movement of alleles between populations and depends on the mobility of
individuals
-migration from one population to another changes allele frequencies and can prevent fixation
-migration is a homogenizing evolutionary process in that it causes no heterozygosity
Pg 232-242
-the variation generated by mutation is random in the sense that when mutation substitutes
}vu]v}](}v}Z}]vU]}v[PÁZZ]uP}]u}ÀZ
protein function
-natural selection is not random
-genetic drift only leads to changes in allele frequency caused by chance
(refer to example on pg233)
-in a small population, chance events produce outcomes that differ from theoretical
expectations
-sampling error is the random discrepancy between theoretical expectations and actual results
-sampling error in the production of zygotes from a gene pool is genetic drift
-Pv]](v[}µ]}v
-selection is differential reproductive success that happens for a reason while genetic drift just
happens
-as sample size increases, sampling error decreases
-genetic drift is a powerful evolutionary mechanism in small populations but declines in larger
populations
-the founder effect is the allele frequencies in the new population being different from the
source population simply by chance
-the founding of a new population by a small group of individuals typically represents not only
the establishment of a new population but the evolution of differences between the new and
old population
(refer to pg240)
-because the fluctuations in allele frequencies from one generation to the next are caused by
random sampling error, every population follows a unique evolutionary path
-given sufficient time, genetic drift can produce substantial changes in allele frequencies even in
populations that are fairly large
-the wandering allele frequencies cause alleles to drift to fixation or loss and the frequency of
heterozygotes declines
-the frequency of heterozygotes in a population is sometimes called the popul]}v[
heterozygosity
www.notesolution.com
Unlock document

This preview shows half of the first page of the document.
Unlock all 2 pages and 3 million more documents.

Already have an account? Log in

Get OneClass Notes+

Unlimited access to class notes and textbook notes.

YearlyBest Value
75% OFF
$8 USD/m
Monthly
$30 USD/m
You will be charged $96 USD upfront and auto renewed at the end of each cycle. You may cancel anytime under Payment Settings. For more information, see our Terms and Privacy.
Payments are encrypted using 256-bit SSL. Powered by Stripe.