Anth 110 Lesson #8 Quiz #4 - Allen Japa

.pdf

School

California State University, East Bay *

*We aren’t endorsed by this school

Course

110

Subject

Anthropology

Date

Apr 3, 2024

Type

pdf

Pages

Uploaded by LieutenantSnowTarsier48

Anthropology 110 Lesson #8 Quiz #4 For Friday, February 9 th . Due Monday, February 12 th . From Chapter 4, on-line lessons, and assigned videos answering the following questions: 1._T__R.A. Fisher in 1918 published a paper that set the stage for what became known as the “Synthetic Theory of Evolution which merged Mendelian genetics and evolution by natural selection into a unified theory. True, page 69. 2._T__One of the most important early tools used by population geneticists was (and still is) the model of Hardy-Weinberg equilibrium. True, page 69. 3._T__In dealing with two alleles at a single locus, the frequency of one allele in a population and the frequency of the other adds up to 100%, the Hardy-Weinberg model stated this fact mathematically by p+ q = 1. True, page 69. 4._F__Usually alleles interact as a pair. The alleles combine to form a phenotype, with one allele being dominant over the other. False page 72, 5.Genotype frequencies can be calculated using the HW model of (p+q) (p+q) = P2 + 2PQ+ Q2 = 1. If the frequency of the “p” allele is .2 what is the frequency of the “q” allele? Answer _ 0.8 __. What would be the expected genotype frequency of the heterozygote in this population? Answer 0.32 . 6._T__Figure 4-3 is an illustration of all the forces that can result in evolutionary change. Hardy-Weinberg equilibrium depends upon the fact that all these forces are in balance. For example, for mutations to be in balance and not upset HW equilibrium, the numbers of new mutations that occur must equal the number of mutations that are lost by different means. True, page 72. 7._T__ The estimate of new mutations is anywhere between 1 in 10,000 to 1 in 1,000,000 alleles per generation. True, page 72

8._T__The effective population size is usually smaller than the real census population size because not everyone breeds and leaves offspring. One factor that would lead to a lower effective population size is an unequal sex ratio. True page 75 figure 4-6 9._T__Random mating is a term also known as panmixis. True, page 75 10._F__Non-random mating rarely changes allele frequency by decreasing the percentage of homozygosity over time, thus does not affect HW equilibrium. False page 75, non random mating alters genotype frequencies and does affect the HW equilibrium 11._F__According to the text, red haired people tend to avoid other red-haired people as mates. This is called positive assortative mating. False page 78, positive assortative mating is people trying to mate with others that look like themselves 12._T__In terms of migration patterns, if gene flow diminishes between migrant and its parent population at some point the migrant population will become genetically distinct from the parent population. True, page 78 13. _B__ 16% of a population is unable to taste the chemical PTC. The allele for non-tasting is recessive to the allele for “tasters.” The percentage of the population who are expected to be heterozygous for the trait (those who have the genotype of Aa ) is (a) .36, (b) .48 , (c) .52, (d) 64. Choose one letter for the correct answer and show mathematically how you determined your answer. Frequency of aa = 0.16 Frequency of a = sqrt of 0.16 = 0.4 Frequency of A = 1 - Frequency of a (0.4) = 0.6 Frequency of A = 0.6 Frequency of Aa = 2 x Frequency of A(0.6) x Frequency of a(0.4) = 0.48 14._F__Founder effect is where a fairly large number of people whose allele frequencies are quite different from that of the parent population colonize some isolated area. False page 81, founder effect is colonization of an isolated area by a small number of individuals determines the genetic characteristics of a new population.

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version