Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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- a) Suppose the frequency of the recessive allele a for the recessive condition albinism is 0.2 Assume the Hardy-Weinberg distribution. ai) What is the frequency of albinism in the general population? aii) What fraction of the population are carriers? b) In a large population of mice, 0.58 have the recessive genetic condition rsiancer (fictional). Assume the Hardy-Weinberg distribution. What fraction of mice are carriers? Giver your answer with two digits parts the decimal point. c) In a large population of squirrels, 0.14 have the recessive genetic condition nlourianfilindr (fictional). Assume the Hardy-Weinberg distribution. What is the frequency of the dominant allele in this population? Give your answer with two digits parts the decimal point. d) In a large population of chimpanzees, there is a recessive genetic condition telactalase (fictional). Assume the Hardy-Weinberg distribution. If the frequency of dominant allele is 0.77 then what fraction of the population has…arrow_forwardYou discover a new X-linked mutation for antenna shape in Drosophila (fruit flies) which produces long antennae. You call this new allele long (XL2), and discover it is incompletely dominant with the short antennae allele (XL1), meaning that heterozygotes have antennae that are intermediate in length. In your laboratory population, 9% of the males have long antennae. Assuming your population is in Hardy-Weinberg equilibrium, what proportion of females would you expect to have intermediate antennae? Answer choices: 0.50 0.90 0.83 0.0081 0.16arrow_forwardA total of 6500 North American Caucasians were blood typed for the MN locus, which is determined by two codominant alleles LM and LN. The following data were obtained: Blood Type M MN N a. 0.52, b. 0.23 a. 0.52, b. 0.12 0.48, 0.12 Number a. What is the allele frequency of LM in the population (LM=p) b. What is the genotypic frequency of LNLN? a. 0.48, b. 0.23 1800 3200 1500arrow_forward
- Approximately 1% of the magpies (Pica pica) in a hypothetical populations are albino. Assume that the albino phenotype is due to a recessive allele and that this population is in HardyWeinberg proportions at this locus. (a) What is the estimated frequency of the albino allele in this population? (b) What is the probability that the first progeny born to a mating between an albino and a normal magpie from this population will be albino? (Hint: what is the probability that the normal magpie is heterozygous, given the allele frequencies in this population?)arrow_forwardA very large population of rabbits has been allowed to breed randomly in a laboratory research program. The rabbits vary in their coat colour, which is either gray or black. After many generations, 25% of the rabbits display a recessive phenotype for gray coat colour (aa), the same percentage as at the beginning of the breeding program. The other 75% of the rabbits show the dominant black coat phenotype, with heterozygotes (Aa) indistinguishable from the homozygous dominants (AA) What is a reasonable conclusion explaining the fact that the frequency of the recessive trait (aa) has not changed over time? a. There has been sexual selection favouring allele a b. The two phenotypes have about equal fitness under laboratory conditions C. The population is undergoing genetic drift d. The genotype AA is lethalarrow_forwardParent Generation BB BB Bb Bb Bb Bb Bb Bb bb bb Rabbits with the brown coat color allele (B) are dominant over rabbits with the white coat color allele (b). A small population of rabbits (Parent Generation) has 2 individuals homozygous for B, 6 individuals that are heterozygous, and 2 individuals homozygous for b. What would you predict the frequencies of alleles B and b to be in the next (first) generation if this population is not evolving Edit View Insert Format Tools Tablearrow_forward
- 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. Researchers using genetic testing are able to determine the following numbers of individuals of each genotype in another population of geese: DD = 10576, Dd = 14503, dd = 4922. -According to the Hardy-Weinberg equilibrium, what is the expected number of individuals of genotype DD? -Calculate the chi-square statistic from these data. What is the value of the chi-square statistic?arrow_forwardA mountain region has a population of 5,000 mountain goats. You score these animals for the R locus and find that this locus has two alleles, R (dominant) and r (recessive). 3200 individuals are homozygous dominant, 1,600 are heterozygous, and 200 are homozygous recessive. a) Calculate the allele frequencies for this population. Show your work. b) Calculate the observed genotypic frequencies for this population. Show your work. c) Calculate the expected genotype frequencies if the population is in Hardy-Weinberg equilibrium. Show your work. d) Does this population appear to be at H-W equilibrium? Why or why not? (You do not need to analyze this statistically).arrow_forward
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