In Population Genetics; What is the frequency of the heterozygotes Aa in a random mating population if the frequency of the recessive phenotypes (aa) is 0.9?
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Q: Is it possible for a recessive trait to be frequently expressed in a population? Why?
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Q: 1. You have sampled a population in which you know that the percentage of the homozygous recessive…
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2. In Population Genetics; What is the frequency of the heterozygotes Aa in a random mating population if the frequency of the recessive
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- 3. In Population Genetics; Within in randomly mating population of mammals, the homozygous presence of the recessive allele a causes white spotting in the fur while the presence of dominant allele A caused solid color. A survey was made and of 137 tagged, 4 were spotted. What is the frequency of the recessive gene, of the dominant allele, and of the heterozygote?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 0.3476. 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?
- 3. Frequency Calculation In a population of 80 rabbits, 20 are homozygous dominant, 40 are heterozygotes, and 20 are albino homozygous recessive. a. Provide the frequencies of each genotype and the frequencies of each allele in the gene pool. Use proper notation (for example, f(AA)). Answer: b. Why do the frequencies add up to 1? Answer:1. Consider a locus having two alleles Aj and A2, If the homozygote A1A1 and the heterozygote A1A2 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 ?1. In a population of 1000 bison, there are two alleles at the B locus. It acts incompletely dominantly, so that you are able to figure out each animal's genotype simply by observing its phenotype. How convenient. You find 665 BB, 225 Bb, and 110 bb bison. a) What are the allele frequencies of B and b? (round off the number) b) Using the allele frequencies, what numbers (not just fractions, but numbers of actual bison in this population of 1000 and yes you can round off) would you expect to be BB, Bb, and bb? c) Do you think this bison population is in HW equilibrium? d) No matter what your answer to c, if they weren't in HW equilibrium, name 5 possible reasons why.
- 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. 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.p? + 2pq + q? = 1 (to determine the genotype frequencies) and p+q =1 (to determine the allele frequencies) p = frequency of the dominant allele in the population q = frequency of the recessive allele in the population p = percentage of homozygous dominant individuals q?: = percentage of homozygous recessive individuals 2pq = percentage of heterozygous individuals Homework Problems For these problems you will need to use a calculator and can round for the percentages. the nearest who number Example problem: You have sampled a population in which you know that the percentage of the homozygous recessive genotype (aa) is 36%. Using that 36%, calculate the following: A. The frequency of the "aa" genotype. Answer: 36% (given) B. The frequency of the "a" allele. Answer: The frequency of aa is 36%, which means that q? = 0.36. If q? = 0.36, then q = 0.6, because 0.62 is equal to 0.36. Since q equals the frequency of the a allele, then the frequency is 60%. C. The frequency of the "A" allele.…
- 1. In a population where the frequency of white flowers was 16%, what % of the individuals would you expect to be heterozygous? 2. In a population where the frequency of white flowers was 16%, what % of the individuals would you expect to be homozygous dominant?3. In a given population, only the "A" and "B" alleles are present in the ABO system; there are no individuals with type "O" blood or with O alleles in this particular population. If 200 people have type A blood, 75 have type AB blood, and 25 have type B blood, what are the alleleic frequencies of this population (i.e., what are p and q)?1. The ability to taste the compound PTC is controlled by a dominant allele T, while individuals homozygous for the recessive allele (t) cannot taste PTC. In a population consisting of 500 individuals, 347 are tasters and 153 are non-PTC tasters. Calculate the frequency of the T and t alleles in this population, and frequency of the genotypes.(Please train yourself to use the Hardy-Weinberg equation.)To present your answers, follow the format in the picture below.