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BSC 385 Lecture Notes - Lecture 3: Heterozygote Advantage, Overdominance, Hemoglobin

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graysardine594
22 Mar 2016
School
University of Alabama
Department
Biological Sciences
Course
BSC 385
Professor
Jonathan Benstead

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Document Summary

08/24/2015 (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) H-w equilibrium can be extended to any number of alleles. The ability of an individual genotype or phenotype to both survive and reproduce (cid:1) W = the average contribution of an average individual of a certain genotype to the gene pool of the next generation. W is relative to other genotypes or phenotypes in the same population. No sampling bias, no effect from chance events, no genetic drift. No alleles coming in from the outside, no migration. No new alleles are spontaneously arising in the population. All alleles have an equal probability of surviving. Violations of these assumptions = evolution (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) Selection occurs when a particular genotype does not survive or reproduce in the same proportion as others (cid:1)

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Related Questions

Consider a wildflower population with the following allele and genotype frequencies.

Frequency of the CRallele: p = 0.6

Frequency of the CWallele: q = 0.4

Frequency of CRCR: 50%

Frequency of CRCW: 20%

Frequency of CWCW: 30%

Is this population in Hardy-Weinberg equilibrium?

No, the frequency of genotype CRCWis too low.
No, the frequency of genotype CRCRis too low.
Yes, the genotype frequencies are what we would expect for a population in Hardy-Weinberg equilibrium.
No, the frequency of genotype CWCWis too low.

I need this in 15 min!Please help!!!1

A gene in a population of sexually reproducing organisms with the following genotype frequencies is at Hardy-Weinberg Equilibrium: BB 100, Bb 800, bb 100

A) true B)false C) can not be determined

Which of the following evolutionary forces would be the best explanation for the genotype frequencies in the population in the above question?

A) genetic drift B) there are no evolutionary forces acting on this gene population C)assortive mating D) Overdominance E)Directional selection

If a population is at Hardy-Weinberg equilibrium, which of the following allele frequencies would yield the smallest number of heterozygotes? A)

A=0.25, B=0.75 B) A=0.75, B=0.25

C)A=0.50, B=0.50

D)A=0.10, B=0.90

Fixation occurs when one allele becomes the only allele for a gene in a population, meaning that all other alleles for that gene have been lost. True or false

In 1908 Hardy and Weinberg published papers showing that the binomial or multinomial could be applied in genetics to predict the frequencies of genotypes when allele frequencies where known. The formal algebraic proof of this Hardy-Weinberg Equilibrium Law assumes that there is no mutation in the population. This assumption is necessary, because a. organisms reproduce sexually and litter or family sizes vary. b. populations will exhibit random sampling changes in allele frequency. c. populations are not infinite and the Hardy-Weinberg proof is only a very crude approximation when natural selection is acting. d. populations are not closed and reproduce both sexually and asexually so an infinite size population is required to preserve genetic variation. e. allowing alleles to change would alter their frequencies.