ECO EVO 200A Lecture Notes - Lecture 1: Phosphoglucomutase, Mns Antigen System, Peppered Moth

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coralbeaver953

24 Apr 2016

School

UC-Irvine

Department

Ecology and Evolutionary Biology

Course

ECO EVO 200A

Professor

Steven Allison

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Document Summary

1. 1) a gene that contributes to height in a population of plants has two alleles: a and a. Given the following observed genotype frequencies, calculate the frequency of each allele. 1. 2) a sample of individuals from a population of the highly self-fertilizing plant species, Arabidopsis thaliana, was found to exhibit the following genotype counts at a particular locus: 45. Estimate the gene diversity and the frequency of heterozygotes at this locus. 1. 3) assume that there are three codominant variants, s (slow), i (intermediate), and f (fast), at an autosomal locus of a diploid species. 250: calculate allele frequencies, calculate the gene diversity. 1. 4) a survey of variation at 8 enzymatic loci in the species drosophila landei showed that 6 of them had a predominant allele with frequency of at least 0. 99. The frequencies at the remaining two loci were as follows:

Related Questions

1. In a tropical human population in Hardy-Weinberg equilibrium for an autosomal locus determining the presence of pigment in the skin, the frequency of albinism (aa) is 1 in 10,000. What is the approximate frequency of the heterozygotes (Aa)? Please show your work.

2. Variation in horn length in rhinoceros beetles results from allelic variation in a single gene. Assume Hardy-Weinberg equilibrium and determine the allelic frequencies of L1, L2 and L3, genotypic frequencies of long-horned, short-horned and absent-horned beetles in this population. Please show your work.

Genotype Phenotype N

L1/L1

L1/L2 LONG 7500

L1/L3

L2/L2

L2/L3 SHORT 2100

L3/L3 ABSENT 400

3. In a population of African Black Mamba snake, one locus A on chromosome 5 has been found responsible for the aggressive phenotype. It appears that the aggressive phenotype is greatly associated with the body length phenotype locus B, which present in the adjacent locus on chromosome 5. Determine the relationship between these loci using the population data given below. Are these two loci in linkage equilibrium? If not, what is the disequilibrium value for this population? Please show your work

Haplotype N

A1B1 200

A1B2 50

A2B1 100

A2B2 650

limegnu434

Consider a single locus with three alleles: A₁, A₂, and A₃.

1) Write down all of the diploid genotypes possible at this locus.

2) Derive the equation for the frequency of allele A₁ as a function of the genotype frequencies.

Consider the following two datasets:

At the M locus:

In a study of 1000 adults, the following genotype numbers were found:

M₁M₁ - 213 individuals

M₁M₂ - 489 individuals

M₂M₂ - 298 individuals

At the S locus:

In a study of 4555 adults, the following genotype numbers were found:

S₁S₁ - 3564 individuals

S₁S₂ - 979 individuals

S₂S₂ - 12 individuals

Assignment: For both loci

Calculate the frequency of the alleles.

Calculate expected number of each genotype if the population were in Hardy-Weinberg equilibrium.

Identify which locus most clearly violates at least one of the H-W assumptions

Rank the following terms in increasing order of scale accordingto your knowledge of their definitions:

-Locus
-Allele
-Chromosome
-Gene

If 16% of a population expressed a recessive trait, whatpercentage of the gene pool is the dominant allele?

Consider a population of Peach-faced lovebirds where:

65% of all gametes carry a dominant allele (F)for regular plumage (feather colors).

The remaining 35% carry the recessive allele(f) for a plumage with white.

When two heterozygous (Ff) individuals breed,we expect the genotype Ff to account for_____% ofthe new generation.

In the case of a species of sea lions displaying assortativemating (where individuals prefer to mate with individuals that looklike them), the conditions for Hardy-Weinberg Equilibrium are stillmet and supported (T or F)

If 90% of the alleles in a population are dominant, what is theratio of genotypes?

What are genes comprised of?

In the Hardy-Weinberg equation, what does 2pq denote?

Without strong natural selection, recessive alleles willinevitable disappear from a population T or F

If the proportion of sickle-cell sufferers(HbS-HbS homozygotes) in a population is 0.04,according to the Hardy-Weinberg equation, what is the proportion ofsickle-cell carriers (HbS-HbA heterozygotes) in thatpopulation?

coralherring96

ECO EVO 200A Lecture Notes - Lecture 1: Phosphoglucomutase, Mns Antigen System, Peppered Moth

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