Question 2 Calculate the genotypic and allele frequencies with a given population. 47 individuals (13 BB, 23 Bb, 11 bb) a. What is the frequency of homozygous dominant individuals? b. What is the frequency of homozygous recessive individuals? c. What is the frequency of heterozygous individuals? d. How many alleles are in the population? e. What is the frequency of the dominant allele? f. What is the frequency of the recessive allele? Answers
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- Question: What does relative allele frequency mean? a. The probability of passing the allele to your offspring b. How common a given allele is in a population c. The frequency of having a heterozygous genotype d. The probability of mutationQuestion 1.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. B) The frequency of the "a" allele. C) frequency of the a allele, then the frequency is 60%. Question 6A very large population of randomly-mating laboratory mice contains 35% white mice. White colouring is caused by the double recessive genotype, "aa". Calculate allelic and genotypic frequencies for this population. Question 7After graduation, you and 19 of your closest friends (lets say altogether 10 males and 10 females) charter a plane to go on a round-the-world tour. Unfortunately, you all crash land (safely) on a deserted island. No one finds you and you start a new population totally isolated from the rest of the world. Two of your friends carry (i.e. are heterozygous for) the recessive cystic fibrosis allele (c). Assuming that the frequency of this allele does not change as…QUESTION 21 Which of the following can the results of a QTL tell you? a. The specific causative gene or genes underlying a trait you are studying. b. The heritability of your trait and how much the heritability is influenced by environment. c. Identify haplotypes associated with specific traits of interest in other populations. d. Identification of regions of the genome that are associated with a trait.
- (1 point) Humans with the genotypes DD and Dd show the Rh+ blood phenotype, whereas those with the genotype dd show the Rh- blood phenotype. In a sample of 400 Basques from Spain, 230 people were Rh+ and 170 people were Rh-. Assuming that this population is in Hardy-Weinberg proportions, what is the allele frequency of the allele D? (a) (a) 0.348 (answer) (b) (b) 0.652 (c) (c) 0.425 (d) (d) 0.575 (e) (e) 0.288 2. (2 points) In the Basque population mentioned above, what proportion of the Rh+ individuals would be expected to be heterozygote? (a) (a) 0.454 (b) (b) 0.789 (answer) (c) (c) 0.516 (d) (d) 0.250 (e) (e) 0.500 How is the answer for #2, b? please explainQUESTION 21 Suppose that in a population the frequency of a particular recessive condition is 1/400. Assume the presence of only a dominant allele (A) and a recessive allele (a) in the population and that the population is at Hardy-Weinberg equilibrium. What is the frequency of heterozygotes in the population? a. 0.0025 b. 0.9025 OC. 0.05 Od. 0.0475 e. 0.095assume the populations are in Hardy-Weinberg equilibrium with respect to the gene in question. You MUST SHOW your work to meet this objective. 26. In pea plants, flowers can be purple (dominant allele, A) or white (recessive allele, a). If 75% of alleles in a population are purple (A) alleles, what is the frequency of homozygous recessive plants?
- QUESTION 3 Assume the allele P' has a population-wide frequency of 0.001. What are the chances that a person chosen at random from the population will suffer from porphyria? O 0.001 O2(0.001)(0.999) 4(0.001) O2(0.001) 0.001*0.001QUESTION 1) The vocal properties of the shrieking eels of Florin are controlled by three genes. The dominant alleles, L (loudness), P (pitch) and T (timing) cause eels to emit loud, high-pitched shrieks in the morning. The recessive alleles (I, p, and t) cause eels to sing softly, at a low pitch, in the evening. In a three-point linkage analysis experiment, I carried out a test cross using a triply heterozygous eel and a triple recessive partner. When the eggs hatched, I found that the resulting 8000 offspring had the following phenotypes i) Loud, high pitch, morning 160 ii) Loud, high pitch, evening 690 iii) Loud, low pitch, evening 3000 iv) Loud, low pitch, morning 10 v) Quiet, high pitch, morning 3360 vi) Quiet, high pitch, evening 30 vii) Quiet, low pitch, evening 240 viii) Quiet, low pitch, morning 510 Calculate and draw the genetic map for the genes L, P and T including distances. (THE NUMBERS ARE VERY SIMPLE SO A CALCULATOR SHOULD NOT BE REQUIRED, SHOW YOUR WORKING AND USE…In a population with 1000 individuals and at Hardy-Weinberg equilibrium, the frequency of individuals with galactosemia is 4%.a. What are the frequencies of the dominant and recessive alleles?b. What is the expected frequency of the homozygous dominant in the population?c. What would be the expected frequency of the heterozygous dominant after five generations?
- QUESTION 46 Consider selection acting against dominant alleles compared to selection acting against recessive alleles. Which will lead to faster allele fixation and why?QUESTION 64 The graphs to the left and right respectively refer to before and after selection. Which type of selection has occurred in this population? Phenotype frequency Phenotype frequency Trait value Trait value (before selection) (after selection) A. directional B. disruptive (or diversifying) C. stabilizing O D. frequency-dependentSuppose the frequency of the recessive allele a for the recessive condition albinism is 0.2 Assume the Hardy-Weinberg distribution. What is the frequency of albinism in the general population? What fraction of the population are carriers?