Which Hardy-Weinberg equation relates the frequencies of the alleles at a particular gene locus?

How is it possible that there are multiple different alleles in a population and yet any individual can have only two alleles?

Figure 19-11 shows the expected distributions for thethree genotypic classes if the B locus is a QTL affectingthe trait value.a. As drawn, what is the dominance/additive (D/A)ratio?b. How would you redraw this figure if the B locus hadno effect on the trait value?c. How would the positions along the x-axis of thecurves for the different genotypic classes of the B locuschange if D/A = 1.0?

What is one assumption of the Hardy-Weinberg law that does not hold true for all populations?

How is the standard deviation related to the variance?

The following data for the genotypes at the alcohol dehydrogenase locus were observed from a sample of Drosophila melanogaster. Sample size 1000 FF 550 FF=0.55; FS=0.34; SS=0.11 O F-0.72; S=0.28 FF=0.078; FS=0.40; SS=0.52 FS What are the Hardy-Weinberg equilibrium genotype frequencies for each genotype based upon this sample? OFF=0.52; FS=0.40; SS=0.078 340 SS 110

A population of 40 asters segregating at two loci with two alleles each (A/T and G/C) has 8 individuals with the AAGGgenotype. The allele frequencies of A and G are 0.5 and 0.5 in the population.   What is the coefficient of gametic disequilibrium, D?   What is the value of Lewontin’s D’? (that is “D prime”)

Suppose the frequency of the recessive allele a for the recessive condition albinism is 0.2 Assume the Hardy-Weinberg distribution.    What is the frequency of albinism in the general population?  What fraction of the population are carriers?

You sample a fruit fly (Drosophila melanogaster) population for the alcohol dehydrogenase (Adh) gene. There are two alleles, designated A₁ and A2, for this locus in this population. The data you collected is shown in this table (this is your observed data). Is this population in Hardy-Weinberg equilibrium at this locus? To save you time, I have calculated the expected number of individuals for each genotype and included them in the table. For your answer, you should provide: • an answer to the question: Is this population in Hardy-Weinberg equilibrium for this locus? • the value of your chi-square result you based this answer on (you do not have to show your calculations for the homework, but you would on an exam) • (if you say the population is NOT in HW equilibrium) an evaluation of which genotype(s) are more or less common than expected in the observed population # individuals genotype A₁A₁ # individuals genotype A₁A2 # individuals genotype A₂A2 154 117 Observed data Expected data…

What evolutionary factors can cause allele frequencies to change and possibly lead to a genetic polymorphism? Discuss the relative importance of each type of process.