2. Dwarf lupine, a California wildflower, commonly has blue flowers, but some plants produce pink flowers. Flower color is controlled by one gene with blue dominant and pink recessive. One population has 3,291 plants with blue flowers and 25 plants with pink flowers, resulting in a total of 3,316 plants. Assuming that the population is in Hardy-Weinberg equilibrium, what is the expected number of plants that are heterozygous? Do you understand how to calculate the answer as being 526 plants?

2. Dwarf lupine, a California wildflower, commonly has blue flowers, but some plants produce pink flowers. Flower color is controlled by one gene with blue dominant and pink recessive. One population has 3,291 plants with blue flowers and 25 plants with pink flowers, resulting in a total of 3,316 plants. Assuming that the population is in Hardy-Weinberg equilibrium, what is the expected number of plants that are heterozygous? Do you understand how to calculate the answer as being 526 plants?

Name: 2. Dwarf lupine, a California wildflower, commonly has blue flowers,
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Description: 2. Dwarf lupine, a California wildflower, commonly has blue flowers, but some plants producepink flowers. Flower color is controlled by one gene with blue dominant and pink recessive.One population has 3,291 plants with blue flowers and 25 plants wi

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter19: The Evolution Of Populations

Section: Chapter Questions

Problem 1VCQ: Figure 19.2 In plants, violet flower color (V) is dominant over white (v). If p = .8 and q = 0.2 in...

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1. Calculate the genotype frequencies of a population of flowers where the frequency of the CR allele is 0.8 and the CW is 0.2. There is incomplete dominance, and the population is in equilibrium. Do you understand how to calculate the following answers? CRCR 0.64 CRCW = 0.32 CWCW=0.04 total = 1.00 = ninige bas amm di mislqx
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.
1. The following table gives data for the frequency of genotypes in a population of sunflower plants from a coastal sage scrub community over the course of 50 generations. Gene products of the A allele produce stems without hairs, while gene products of the a allele produce stems with short hairs but flowers with many infertile stamens, and the a' allele produces stems with dense hairs and flowers with all fertile stamens. Note that it may cost the plants greatly in extra carbon to produce these hairs. At the onset of this survey, an invasive insect species that feeds upon the buds of sunflowers had been accidentally introduced into the habitat of this plant population. This insect makes its living by ascending the stems of herbaceous plants rather than landing upon the flower stalks or stems. Thus, dense hairs would impede the ability of this insect to reach the buds. Interpret the results of the data and explain how natural selection might be driving the genotype frequencies in this…
6. In a population of mice, coat color is controlled by a single additive locus. BB mice are black, bb mice are white, and Bb mice are grey. The population is currently in HWE, with 1% of the mice having the white phenotype. Grey mice have twice as many offspring as black or white mice. What will be the frequency of the b allele in the next generation? The answer is supposed to be 0.16, can you explain how to get to this?
If the genotype frequencies in a population are 0.60 AA, 0.20 Aa, and 0.20 aa, and if the requirements of the HardyWeinberg principle apply, the genotype frequencies in the offspring generation will be: a. 0.60 AA, 0.20 Aa, 0.20 aa. b. 0.36 AA, 0.60 Aa, 0.04 aa. c. 0.49 AA, 0.42 Aa, 0.09 aa. d. 0.70 AA, 0.00 Aa, 0.30 aa. e. 0.64 AA, 0.32 Aa, 0.04 aa.
Figure 19.2 In plants, violet flower color (V) is dominant over white (v). If p = .8 and q = 0.2 in a population of 500 plants, how many individuals would you expect to be homozygous dominant (VV), heterozygous (Vv), and homozygous recessive (vv)? How many plants would you expect to have violet flowers, and how many would have white flowers?
2. In the following types of matings, the phenotypes of the parents are listed together with the frequencies of phenotypes occurring among their offspring. Indicate the genotype of each parent (you may need to use testcrossesl). Parents Offspring I B:0 을 A: 을B 을 AB : B: A: 0 를 AB : 를 A a. Вx В Ь. Ох АВ Ox AB Bx A d. Bx A C. TV Sex Lin ko
1. The frequency of PKU in the human population is 1 X 104.What is the expected frequency among the offspring of first cousins (F=1/16)? A D B.
2. In a population of twelve-spotted skimmers (Libellula pulchella), 27.6% of the individuals are recessive homozygotes for green spots. In a population of 924 individuals that is in Hardy-Weinberg Equilibrium, calculate the percentage AND number of dominant homozygotes and heterozygotes in this population.
18. What would be the expected genotypic ratio in the offspring of a mating between two heterozygotes ? 1. 1 LL: 1II 2. 3 dominant phenotype: 1 recessive phenotype 3. 1 LL: 2LI: 1II 4. 3 LL: 1II
1.) Consider flower color in a hypothetical population of 7,000 flowers, red flowers (4,000), blueflowers (2,000) are dominant over pink flowers. If there are 1,000 pink flowers, find thefollowing:a. Frequency of dominant (red flower) alleleb. Frequency of recessive (pink flower) allelec. Frequency of each genotype (homozygous dominant, homozygous recessive,heterozygous)d. Make a Punnett square and use the rule of multiplication.
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