Suppose a population of mice is subject to a few years of very cold, dry winters that drastically decreases their numbers. After the decrease in population size, there was a population of 200 mice, with 182 showing the dominant long tail phenotype and 18 showing the recessive short tail phenotype. a. What is the frequency of the recessive allele? b. What is the frequency of the dominant allele?
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- Suppose that in wasps, brown wings are dominant to white wings, and 40% of all wasps in a population you’ve sampled have white wings. a. What percentage of the wasps is heterozygous?b. What percentage of the wasps is homozygous dominant?1) 10,000 individuals are sampled from a population and are found to display one of three blood types: AA with 6800 individuals, AB with 2800 individuals and type BB with 400 individuals. a) What is the frequency of each genotype in the population? b) What is the frequency of the A allele? c) What is the frequency of the B allele? d) If the next generation contains 25,000 individuals, how many would have blood type BB, assuming the population is in Hardy-Weinberg Equilibrium?In a population of mountain lions, 9% of the individuals suffer from a disease caused by a recessive allele (aa). A) Calculate the frequency of both the dominant and recessive alleles. B) What is the percentage of homozygous dominant individuals and what is the percentage of heterozygous individuals in the population?
- Scientists study the possible effects of human activity on the genetic variations within members of two populations of sparrows, A and B, that live within similar ecosystems. Population A lives in a recreational campsite while population B lives in a nature preserve. Both populations exhibit similar genetic variation between the parent population and second generation. However, a tornado touches down in the habitat of population A during the lifespan of the second generation. Which statement best describes the predicted difference between the third generation of the two populations? A - Population B underwent a speciation that will lead to an increase in the genetic variation of the third generation compared to population A due to natural selection. B - Population A underwent a speciation that will lead to an increase in the genetic variation of the third generation compared to population B due to natural selection. C - Population B underwent a bottleneck effect that will lead to a…A) Explain why we use the concept of Hardy-Weinberg Equilibrium if populations are never stable? B) What do the mathematical results tell us if the allele frequencies do not match our predictions? (In other words, if you have extra spotted fish in a generation, what has happened?)Please answer both with explanation . Part A. Compared with other factors that can alter allele frequencies, mutation rates. a. are low, but mutations are the source of genetic variability. b. are so low that they make no difference in nature. c. are less important than genetic drift, but more important than migration. d. are the most significant factor in microevolution. e. are so low that they cannot be detected in most populations. Part B. If a gene is described as polymorphic, how many alleles does it have? a. one . b. two . c. two or more. d . more than three . e. none of the above .
- Give written answer with explanation and conclusion A population of rabbits may be brown (the dominant phenotype) or white (the recessive phenotype). Brown rabbits have the genotype BB or Bb. White rabbits have the genotype bb. The frequency of the BB genotype is 0.35. Assuming that this population is in Hardy-Weinberg equilibrium, what is the frequency of the B and b allele respectively?Imagine a population of crabs living on a white sandy beach. The crabs ONLY occur in two color - red and blue, each controlled by color genes. Over time, will the crab population shift toward white? Why or why not?A researcher studies two types of fly populations. Population A have stubby bristles which are both shorter and blunter than population B. This is because the flies are homozygous for a certain allele for the stubble gene which affects bristle length. These flies are ebony coloured with black bodies. This is because they are homozygous for a certain allele for the ebony gene that affects body colour. Population B have longer and tapered bristles than population A and are not stubbly in appearance. This is due to them being homozygous for a different allele for the gene that affects bristle length to population A. These flys are not ebony coloured and have brown bodies. This is due to them being homozygous for the gene that affects body colour. The researcher crosses parental flys (P1) from population A with those from population B and counts the number of offspring that have stubble and non-stubble bristles, and the number of offspring that are ebony-coloured and non-ebony-coloured…
- Under genetic drift, if an allele’s frequency is 1%, what is the likelihood that it will be lost from the population? part B; Construct a graph that describes the likelihood of fixation of a particular allele, for a small population that is under Wright-Fisher genetic drift. Don’t forget to label axes completely.1b.) Which is NOT commonly an effect of inbreeding in a population? a. an increase in the frequency of homozygous dominant individuals b. an increase in the frequency of homozygous recessive individuals c. an increase in the frequency of recessive genetic diseases d. better health and fertility of inbreds lines compared to lines that are not inbred.Which statement illustrates the connection between natural selection and overreproduction of a population? a) populations vary in their inherited traits. b) species produce more offspring than can survive in the environment. c) individuals with inherited traits that promote survival tend to have more surviving offspring. d) individuals with traits that do not enhance survival cannot reproduce.