Q: 1. Charles Darwin published his book On the Origin of Species in 1859. Of the different types…
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28. How is Darwinian “fitness” different than the typical definition used in common speech?
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- Give an example of a trait that may have evolved as a result of the handicap principle and explain your reasoning.92. In natural selection, what is being selected for (or against)? gene genotype phenotype species mutations that arise on a chromosome9. 8. The two histograms represent the frequency distribution for the two different types of variation. Q R 10. A B Which of the statements, A to D, about characteristic Q is correct? с D controlled by many genes and unaffected by the environment number of organisms controlled by one or two genes and unaffected by the environment controlled by many genes and influenced by the environment Your answer controlled by one or two genes and influenced by the environment A. B. W characteristic C. What evidence is given in the pedigree chart below to establish that the condition is caused by a dominant allele? D. number of organisms Two unaffected parents have unaffected children. Two affected parents have affected children. An affected parent and an unaffected parent have affected children. Two affected parents have an unaffected child. A. 0% B. 25% C. 50% characteristic In fruit flies (Drosophila melanogaster) grey body is dominant to black body and normal wings are dominant to vestigial…
- 8. Suppose that initially there are 22% with genotype TT, 16% have the Tt genotype, and 62% have the tt genotype. If the relative fitness of each of these genotypes is 3, 1, and 1, respectively, what is the genotype distribution in the next generation?1. 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).Provide 3 reasons why natural selection allows only the better alleles to be passed onto the next generation. Please explain in details.
- 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. Read the following sentence: “Even though people selectively breed to yield animals with desired traits, there are dangers to selective breeding.” What does yield mean as used in the text? a) To produce b) To surrender c) To endanger d) Not worth much money to remove6. After a population becomes divided by some barrier to gene flow (i.e., reproductive isolating barrier), alleles in the two resulting populations go through a process called lineage sorting. This process is illustrated in the diagram below, in which the past is at the top and the present at the bottom. a) What type of relationship do the two populations have immediately after time X: Polyphyletic, paraphyletic, or reciprocally monophyletic? Briefly explain how you know this. X b) What type of relationship do the two populations have immediately after time Y: Polyphyletic, paraphyletic, or reciprocally monophyletic? Briefly explain how you know this. Z Species A Species B
- 46. In a hypothetical population, a genetic anthropologist has gone in and determined the following genotypes and genotype frequencies for earlobe attachment. From this data, this scientist wants to determine gene frequencies at this locus for the dominant and recessive alleles. Unattached earlobes (E) are the dominant form of the trait while attached earlobes (e) are the recessive form of the trait. At this particular gene locus, the following genotype distribution was determined: (1) dominant homozygote (EE) = 0. 16 (or 16 percent of the individuals are dominant homozygotes for this trait and have unattached earlobes) (2) heterozygote (Ee = 0.48 (or 48 percent of the individuals in this population is heterozygous at this locus and have unattached earlobes) (3) recessive homozygote (ee) = 0.36 (or 36 percent of the individuals in this population are recessive homozygotes and have attached earlobes)...What is the frequency of the dominant allele? * a. 20% b. 30% c. 35% d. 40% e. 60% f.…Definitions: 1. Based on the outcome of natural selection, describe four different modes of natural selection. Provide one example for each mode. Each example must be different from the ones taught in lecture and lab ppt.What is meant by Gene pool?