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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- The phenomenon in which chance events cause unpredictable changes in allele frequencies is called: a. gene flow. b. genetic drift. c. inbreeding. d. balanced polymorphism. e. stabilizing selection.When male lions reach sexual maturity, they leave their group in search of a new pride. This can alter the allele frequencies of the population through which of the following mechanisms? natural selection genetic drift gene flow random mating1. What is the expected time to fixation in generations for a new mutation in a diploid population (like humans) with an effective population size of 50? This new mutation is neutral and has no impact on fitness (e.g. synonymous polymorphism). Assuming the mutation isn’t lost immediately, will it reach fixation faster in a population of Ne=500 or Ne=5,000 and why?
- 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?1. In Population Genetics; The M and N groups are determined by two codominant alleles. In a random sample of 200 persons, 128 were found to belong to group M. Assuming random mating, what is the frequency of the N allele?1. A sample of 600 individuals from a population is examined for the presence of the HindIII polymorphism in an autsomal Sca gene. There are two alleles of Sca gene, A and a. The results are 14 individuals are AA, 212 are Aa, 374 are aa. Please answer the following questions accordingly? How many alleles are present in the gene pool in the sample population fort he Sca gene? What are the genotype frequencies? What are the frequencies of A and a alleles? What are the expected numbers of the three genotypes, assuming random
- 3.) In a population that is in Hardy-Weinberg equilibrium, 45 % of the individuals arehomozygous recessive for a certain trait. In a population of 15,500, how many of the individualswill be;a. homozygous dominant individualsb. heterozygous individuals2. You have sampled a population in which you know that the percentage of the homozygous recessive genotype (a) is 26%. Using that 26%, calculate the following: A. The frequency of the "aa" genotype. B. The frequency of the "a" allele. C. The frequency of the "A" allele. D. The frequencies of the genotypes "AA" and "Aa." E. The frequencies of the two possible phenotypes if "A" is completely dominant over "a1. Explain in 200 words how the Darwinian evolution can decrease or increase the frequency of an allele( or a more complex heritable trait, for that matter).
- 1 in 1700 US Caucasian newborns has cystic fibrosis, which is only present in individuals with the homozygous recessive genotype. Assuming the population is in Hardy Weinberg equilibrium, what is the allele frequency of the dominant allele in the population.About 7% of men in a population are red-green colour blind due to a sex-linked recessive gene. Assuming random mating in the population with respect to colour blindness; c) What percentage of men would be colour blind in the next generation?3. Is it possible for a recessive trait to be frequently expressed in a population? Why?4. If a certain type of trait in a family or clan is considered by most people to be “better” or “ideal”, is itpossible to maintain the same type of trait in the succeeding generations? If so, how?
