Hardy Weinberg problem 2. In snapdragon plants, a gene for flower color has two alleles, R and R'. The RR genotypeproduces a red-flowered phenotype, the R'R' genotype produces a white-flowered phenotype, andthe RR' heterozygote produces a pink-flowered phenotype. In a population of 2,740 snapdragonplants, 966 are red, 1,287 are white, and 487 are pink.a.What is the frequency of the R allele (p)?b. What is the frequency of the R' allele (q)?C.d.e.What is the expected frequency of the RR genotype under HWE?What is the expected frequency of the RR' genotype under HWE?What is the expected frequency of the R'R' genotype under HWE?f. What is the actual frequency of the RR genotype?g.What is the actual frequency of the RR' genotype?h. What is the actual frequency of the R'R' genotype?i. Is the population in Hardy-Weinberg Equilibrium for this gene? How do you know?

Given Information:Total population = 2,740 snapdragon plantsRed-flowered (RR) = 966White-flowered…

Answered: 2. In snapdragon plants, a gene for…

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter12: Mendel, Genes, And Inheritance

Section: Chapter Questions

Problem 6TYK

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1. Set up a punnett square using the following information: 2. Using the punnett square in question #1: a. What is the probability of producing tall plants with purple flowers? Dominate allele for tall plants = D • Recessive allele for dwarf plants = d • Dominate allele for purple flowers = W • Recessive allele for white flowers = w Cross a homozygous dominate parent (DDWW) with a homozygous recessive parent (ddww) Possible genotype(s)? b. What is the probability of producing dwarf plants with white flowers? Possible genotype(s)? c. What is the probability of producing tall plants with white flowers? Possible genotype(s)? d. What is the probability of producing dwarf plants with purple flowers? Possible genotype(s)?
I 2. In frost moths, two alleles of one gene determine the character difference of spotted versus striped wings and two alleles of a separate, independent gene determine the character difference of orange wing background versus white wing background. The results for four matings of moth phenotypes are shown below. [Yes - it's possible for the same phenotypes to have different genotypes]. Mating Parental Phenotypes 1 2 3 4 spotted/white x striped/orange spotted/white x striped/orange spotted/orange x striped/ white spotted/orange x striped/orange Spotted/ orange 122 812 422 623 Number of progeny Spotted/ Striped / white orange 131 128 0 430 0 637 a. Determine which alleles are dominant and assign a letter to each. Striped / white 133 0 0 0 b. What are the genotypes of each parent in each cross? If more than one genotype is possible, list the alternative possibilities.
8. Kernel color in wheat is controlled by 2 pairs of genes (AABB). Determine the color of the offspring with the following genotypes: (Note: 4 contributing alleles – red; 3 contributing alleles – medium red; 2 contributing alleles – intermediate red; 1 contributing allele – red; and 0 – white AAbb x AaBb AABb x Aabb aaBb x Aabb AABb x aabb AABb x AaBb A wheat plant producing medium red seed is crossed with another plant producing intermediate red seed (refer to problem no. 8). How many individuals will be? Red Medium red Intermediate red Light red White
6. In certain plant species such as tomatoes and petunias, a highly polymorphic incompatibility gene Swith more than 100 known alleles prevents self-fertilization and promotes outbreeding. In this form ofincompatibility, a plant cannot accept sperm carrying an allele identical to either of its own incompatibility alleles. If, for example, pollen carryingsperm with allele S1of the incompatibility genelands onto the stigma (a female organ) of a plantthat also carries the S1allele, the sperm cannot fertilize any eggs in that plant. (This phenomenonoccurs because the pollen grain on the stigma cannotgrow a pollen tube to allow the sperm to unite withthe egg.)For the following crosses, indicate whether anyprogeny would be produced, and if so, list all possiblegenotypes of these progeny. a. ♂ S1S2× ♀ S1S2b. ♂ S1S2× ♀ S2S3c. ♂ S1S2× ♀ S3S4d. Explain how this mechanism of incompatibilitywould prevent plant self-fertilization.
26. Snow geese (Chen caerulescens) come in two color types, white “snows” and “blues” with dark bodies. A single gene controls coloration, where the dark (“blue”) allele (D) is dominant. A population of 30,012 geese includes 9236 dark individuals. Genetic testing reveals that 7636 of the 9236 dark individuals are heterozygous (Dd). What is the actual frequency of allele D? 0.819 0.181 0.435 0.347
1. In the milotypes of wheat, 4 recessive genes for height have been identified. They have been designated as h1, h2, h3, and h4. A plant homozygous recessive for these 4 pairs of genes is 21inches tall, while a plant homozygous dominant for these 4 pairs of genes is 45 inches tall. Assume that these alleles contribute quantitatively, cumulative and equally for the height difference. A plant breeder crossed plants with genotypes of H1H1H2H2h3h3h4h4 and h1h1h2h2h3h3H4H4. Both F1 and F2 generations were observed. a. What are the heights of the parents? b. What would be the heights of the F1 plants? c. Enumerate the range of heights that you can expect in the F2 generation. Also, indicate the expected number of plants of each height. d. What would be the expected mean height of the F2 progeny?
1. Alleles of the gene that determines seed coat patternsin lentils can be organized in a dominance series:marbled > spotted = dotted (codominant alleles) >clear. A lentil plant homozygous for the marbled seedcoat pattern allele was crossed to one homozygous forthe spotted pattern allele. In another cross, a homozygous dotted lentil plant was crossed to one homozygous for clear. An F1 plant from the first cross wasthen mated to an F1 plant from the second cross.a. What phenotypes in what proportions are expectedfrom this mating between the two F1 types?b. What are the expected phenotypes of the F1 plantsfrom the two original parental crosses?
3. please answer this question
25., Snow geese (Chen caerulescens) come in two color types, white “snows” and “blues” with dark bodies. A single gene controls coloration, where the dark (“blue”) allele (D) is dominant. A population of 30,012 geese includes 9236 dark individuals. Genetic testing reveals that 7636 of the 9236 dark individuals are heterozygous (Dd). How many individuals are dd? 7636 13140 1600 20776
1. Consider a locus having two alleles A1 and A2, If the homozygote A1A1 and the heterozygote A¡A2 have the same fitness of 1, and the homozygote A2A2 has a fitness s+1, then phenomenon is called complete dominance. What will be the change in the frequency of allele A2 per generation ?
2. A sample of 400 individuals is found to contain: 32 A1A1: 36 A1 A2 : 60 A1A3 57 A2A2 : 90 A2A3 : 125 A3A3 a) Find the gene frequencies after one generation of selfing ww b) Find the percent heterozygosity after one generation of selfing. w w c) Find the frequencies of each heterozygous type.
3. For each possible genotype/phenotype, write down the number of alleles of each type: TT/taster: "taster" alleles "non-taster" alleles Tt /taster: "taster" alleles "non-taster" alleles tt/non-taster: "taster" allele "non-taster" alleles

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