In Drosophila, glued eyes is due to a dominant allele Ge that is lethal when homozygous....
In Drosophila, glued eyes is due to a dominant allele Ge that is lethal when homozygous. A population is established with an initial frequency of Ge equal to 0.178. Calculate the expected frequency in the next generation (p’) assuming:
a. The relative fitness of +/+: Ge/+ is 1:1
b. the relative fitness of +/+: Ge/+ is 1:0.5
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In Drosophila, glued eyes is due to a dominant
allele Ge that is lethal when homozygous....
4. In Drosophila melanogaster, the phenotype curly wings is due to a mutant allele Cy that...
4. In Drosophila melanogaster, the phenotype curly wings is due to a mutant allele Cy that is lethal when homozygous. A population is established with an initial frequency of Cy equal to 0.168. Denoting + as the wild- type (i.e. non-mutant) allele at this locus, calculate the expected frequency of Cy in the next generation if the relative fitness of the ++ homozygote to the Cy/+ heterozygote is: a) 1 : 1 b) 1 : 0.5 c) Briefly explain why...
Assortment of genes on same chromosome In the fruit fly Drosophila, there is a dominant gene...
Assortment of genes on same chromosome In the fruit fly Drosophila, there is a dominant gene for normal wings and its recessive allele for vestigial wings. At another gene locus. there is a dominant gene for red eyes and its recessive allele for purple eyes. A female that was heterozygous at both gene loci was mated with a male that is homozygous for both recessive alleles. Knowing this, complete the sentences with the correct terms. 94% crossing over independent assortment...
In a population, you observe 300 homozygous dominant (AA) individuals, 400 heterozygous (Aa) individuals, and 300...
In a population, you observe 300 homozygous dominant (AA) individuals, 400 heterozygous (Aa) individuals, and 300 homozygous recessive (aa) individuals. Please show all your work while answer the following questions. What are the observed allele frequencies for this population? • observed dominant allele (A) frequency: • observed recessive allele (a) frequency: What are the observed genotype frequencies for this population? • observed homozygous dominant (AA) genotype frequency: • observed heterozygous (Aa) genotype frequency: • observed homozygous recessive (aa) genotype frequency:...
1. Fixation of Dominant Alleles Start with a population that has a gene with two alleles (A and a...
1. Fixation of Dominant Alleles Start with a population that has a gene with two alleles (A and a) with classical Mendelian dominance that are at equal frequency (p0.5. q 0.5). Assume this first generation is at hardy Weinberg equilibrium. Calculate the genotype frequencies AA- a. Aa b. Now assume some environmental change that makes the recessive phenotype completely unfit (fitness- 0). Calculate the allele frequencies and genotype frequencies in the second generation. (Hint: Your calculations might be easier if...
In gerbils there is a recessive mutant gene that causes a lethal condition. For the purpose...
In gerbils there is a recessive mutant gene that causes a lethal condition. For the purpose of this problem let the symbol A denote the normal allele and a the mutant. In heterozygote individuals who carry both versions of the allele (Aa), this causes a white spotting color pattern. Homozygotes for the mutant (aa) die as embryos and are never seen in live gerbils. Since the mutant allele is lethal in the homozygous form, natural selection will occur against the...
A wildflower native to California, the dwarf lupin (Lupinus nanus) normally bears blue flowers but occasionally...
A wildflower native to California, the dwarf lupin (Lupinus nanus) normally bears blue flowers but occasionally bears pink flowers. Flower color is controlled by a single diploid locus, with the blue allele (B) completely dominant over the pink allele (b). In a wild population of lupins, there are 43 pink lupins and 3398 blue lupins, for a total of 3341. Calculate the genotype and allele frequencies of this population, assuming that the population is in Hardy-Weinberg equilibrium: Genotype frequency of...
Please help with the question: Is the frequency of a homozygous dominant genotype equal to the...
Please help with the question: Is the frequency of a
homozygous dominant genotype equal to the proportion of individuals
that show the dominant trait.
3) Is the frequency of a homozygous dominant genotype equal to the proportion of individuals that show the dominant trait? Explain your answer. population is q=0.8 1> In a given population of grizzly bears, 29 of a total of 145 animals exhibit a light fur colour which is controlled by a recessive allele. Four generations later,...
the fruit fly, Drosophila melanogaster, an allele (v) of the gene vermillion gives flies purple eyes...
the fruit fly, Drosophila melanogaster, an allele (v) of the gene vermillion gives flies purple eyes and is recessive to the wildtype red eye color (v+). An allele y of the yellow gene, gives flies a yellow body color compared to the dominant brown body color (yt). A heterozygous females for the two different mutations is test-crossed with mutant (i.e., homozygous recessive) males. The phenotypes of the progeny of this cross and their corresponding numbers are given below Yellow body,...
Case B: In this population, the frequency of the dominant allele, B, is 0.5 and the...
Case B: In this population, the frequency of the dominant allele, B, is 0.5 and the frequency of the recessive allele, b, is 0.5. However, in this situation any individual who is born with the dominant trait has a 50 % chance of not surviving to reproductive age. Assuming that mating is still random, what will happen to the allele frequencies (p and q) after 5 generations? (le. Will one allele increase or decrease?) Prediction (1 mark): Reason (2 marks):...
Hardy Weinberg assignment P + Q = 1 In which P represents frequency of dominant allele...
Hardy Weinberg assignment P + Q = 1 In which P represents frequency of dominant allele and Q represents frequency of the recessive allele P2 + 2PQ + Q2 =1 P2 represents frequency of homozygous dominant 2PQ represents frequency of heterozygous Q2 represents frequency of homozygous recessive Consider a population of beetles on an island. There are 1000 beetles and they have different colored wings. Black wings are dominant over silver wings. Calculate the allele and the genotypic frequencies in...
Assortment of genes on same chromosome In the fruit fly Drosophila, there is a dominant gene for normal wings and its recessive allele for vestigial wings. At another gene locus. there is a dominant gene for red eyes and its recessive allele for purple eyes. A female that was heterozygous at both gene loci was mated with a male that is homozygous for both recessive alleles. Knowing this, complete the sentences with the correct terms. 94% crossing over independent assortment...
In a population, you observe 300 homozygous dominant (AA) individuals, 400 heterozygous (Aa) individuals, and 300 homozygous recessive (aa) individuals. Please show all your work while answer the following questions. What are the observed allele frequencies for this population? • observed dominant allele (A) frequency: • observed recessive allele (a) frequency: What are the observed genotype frequencies for this population? • observed homozygous dominant (AA) genotype frequency: • observed heterozygous (Aa) genotype frequency: • observed homozygous recessive (aa) genotype frequency:...
1. Fixation of Dominant Alleles Start with a population that has a gene with two alleles (A and a) with classical Mendelian dominance that are at equal frequency (p0.5. q 0.5). Assume this first generation is at hardy Weinberg equilibrium. Calculate the genotype frequencies AA- a. Aa b. Now assume some environmental change that makes the recessive phenotype completely unfit (fitness- 0). Calculate the allele frequencies and genotype frequencies in the second generation. (Hint: Your calculations might be easier if...
Please help with the question: Is the frequency of a
homozygous dominant genotype equal to the proportion of individuals
that show the dominant trait.
3) Is the frequency of a homozygous dominant genotype equal to the proportion of individuals that show the dominant trait? Explain your answer. population is q=0.8 1> In a given population of grizzly bears, 29 of a total of 145 animals exhibit a light fur colour which is controlled by a recessive allele. Four generations later,...
the fruit fly, Drosophila melanogaster, an allele (v) of the gene vermillion gives flies purple eyes and is recessive to the wildtype red eye color (v+). An allele y of the yellow gene, gives flies a yellow body color compared to the dominant brown body color (yt). A heterozygous females for the two different mutations is test-crossed with mutant (i.e., homozygous recessive) males. The phenotypes of the progeny of this cross and their corresponding numbers are given below Yellow body,...
Case B: In this population, the frequency of the dominant allele, B, is 0.5 and the frequency of the recessive allele, b, is 0.5. However, in this situation any individual who is born with the dominant trait has a 50 % chance of not surviving to reproductive age. Assuming that mating is still random, what will happen to the allele frequencies (p and q) after 5 generations? (le. Will one allele increase or decrease?) Prediction (1 mark): Reason (2 marks):...
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