Question

In: Biology

Consider a locus with two alleles - B and b. B is dominant, while b is...

Consider a locus with two alleles - B and b. B is dominant, while b is recessive. There is no mutation. B has a selective advantage relative to b, so that the fitnesses of the three genotypes are BB = 1, Bb = 1, and bb = 1-s. In this case, s = 0.50, so that bb homozygotes have 50% fitness of heterozygotes and BB homozygotes. If the population has the following genotypic counts prior to selection of BB = 500, Bb = 250, and bb = 250, what is the frequency of B after one generation with selection? Please give your answer to two decimal places.

Note: the answer is not .39 or .625

Solutions

Expert Solution

Given in the question a locus with two alleles - B and b. B is dominant, while b is recessive. There is no mutation. B has a selective advantage relative to b, so that the fitnesses of the three genotypes are BB = 1, Bb = 1, and bb = 1-s. In this case, s = 0.50, so that bb homozygotes have 50% fitness of heterozygotes and BB homozygotes. If the population has the following genotypic counts prior to selection of BB = 500, Bb = 250, and bb = 250

Plz upvote my answer.Thank you

gladiator answered 11 months ago
Next > < Previous

Related Solutions

Locus A has two alleles (A and a) while locus B has two alleles (B and...
Locus A has two alleles (A and a) while locus B has two alleles (B and b). The recombination frequency between locus A and locus B is 11%. A F1 heterozygote in trans configuration is mated with an aabb individual. What are the expected phenotypic percentages in the resulting progeny? Report your percentages to the tenths place and in the following format, replacing the "0.0" with your percentages.
Let A and B represent two variants (alleles) of the DNA at a certain genome locus...
Let A and B represent two variants (alleles) of the DNA at a certain genome locus (chromosome location). Assume that 40% of all the alleles in a certain population are type A and 30% are type B. The locus is said to be in Hardy-Weinberg equilibrium if the proportion of organisms that are of type AB is (0.40)(0.30) = 0.12 (in other words, alleles A and B are independent). In a sample of 300 organisms, 42 are of type AB....
In a bird species, the shape of the beak is encoded by ONE SINGLE locus with TWO co-dominant alleles N^a and Nz.
  In a bird species, the shape of the beak is encoded by ONE SINGLE locus with TWO co-dominant alleles N^a and Nz. N^a gives long beak in double dose, while individuals who are homozygous for N^z have short beak. In a population, the following genotype frequencies were observed: N^a N^a = 0.5N^a N^z = 0.3N^z N^z = 0.2 a) Assume a total of 600 individuals in the population. Set up a hypothesis, will the frequency be in Hardy-Weinberg equilibrium?...
You have considered single locus and two locus (di) hybrid crosses for loci with alleles that...
You have considered single locus and two locus (di) hybrid crosses for loci with alleles that are completely dominant/recessive. I. Come up with a general rule for the proportion of offspring expected to have the phenotype of all the recessive traits associated with X autosomal loci when fully heterozygous parents are crossed. II. Now, use that logic and provide the expected proportion of offspring that show recessive phenotype for 4 loci and the dominant phenotype the 5th locus when two...
You have considered single locus and two locus (di) hybrid crosses for loci with alleles that...
You have considered single locus and two locus (di) hybrid crosses for loci with alleles that are completely dominant/recessive. I. Come up with a general rule for the proportion of offspring expected to have the phenotype of all the recessive traits associated with X autosomal loci when fully heterozygous parents are crossed. II. Now, use that logic and provide the expected proportion of offspring that show recessive phenotype for 4 loci and the dominant phenotype the 5th locus when two...
Q1. You have considered single locus and two locus (di) hybrid crosses for loci with alleles...
Q1. You have considered single locus and two locus (di) hybrid crosses for loci with alleles that are completely dominant/recessive. Come up with a general rule for the proportion of offspring expected to have the phenotype of all the recessive traits associated with X autosomal loci when fully heterozygous parents are crossed. Now, use that logic and provide the expected proportion of offspring that show recessive phenotype for 4 loci and the dominant phenotype the 5th locus when two fully...
Create the genetic basis of a dog (e.g. a locus with two or more alleles) for...
Create the genetic basis of a dog (e.g. a locus with two or more alleles) for the phenotypic characteristic of the ear size Then create a brief scenario of how the evolutionary forces Genetic Drift, Gene Flow/Migration,Natural Selection)  might change the allele frequency and phenotype in the population For example the trait is tentacle length in octopi and TT octopi have long tentacles, tt octopi have short tentacles and Tt octopi have intermediate tentacles.  In the habitat in which these...
In a population of mice, coat color is controlled by a gene locus with two alleles,...
In a population of mice, coat color is controlled by a gene locus with two alleles, B and W. BB mice are brown, BW are tan and WW mice are white. What is this type of inheritance called? In this population there are 20 brown mice 15 tan mice and 30 white mice. Calculate p and q for this population where p = the allele frequency of B and q = the allele frequency of W.
You are studying a population of 100 lizards that has two alleles at a locus for...
You are studying a population of 100 lizards that has two alleles at a locus for skin color, blue (B) and green (G). There are 30 individuals with the BB genotype, 30 individuals with the BG genotype, and 40 individuals with the GG genotype. (a) What are the allele frequencies of B and G in the starting population? Show your calculations. (b) Is this population in Hardy-Weinberg equilibrium? Show your calculations.
Use this information for the two questions below: A and a are dominant and recessive alleles,...
Use this information for the two questions below: A and a are dominant and recessive alleles, respectively, of the same gene pair. 14) Which genotype(s) would result in an individual with the dominant phenotype? A) Aa and aa B) only AA C) only Aa D) AA and Aa E) AA and aa 15) Which genotype(s) would result in an individual with the recessive phenotype? A) AA only B) Aa only C) AA or aa D) Aa or aa E) aa...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT