There is some evidence that selection on white fur color in cats resulted in unintentional selection on hearing abilities. About 40% of white-furred, blue-eyed cats are also deaf. It turns out the gene responsible for pigmentation here also affects the fluid in the ear canals. This is most consistent with what phenomenon in genetics? Inbreeding Linkage Heritability Pleiotropy

There is some evidence that selection on white fur color in cats resulted in unintentional selection on hearing abilities. About 40% of white-furred, blue-eyed cats are also deaf. It turns out the gene responsible for pigmentation here also affects the fluid in the ear canals. This is most consistent with what phenomenon in genetics? Inbreeding Linkage Heritability Pleiotropy

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter19: Population Genetics And Human Evolution

Section: Chapter Questions

Problem 20QP: Natural Selection Affects the Frequency of Genetic Disorders Will a recessive allele that is lethal...

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You are examining a population of snakes in which 20% of the individuals exhibit the recessive phenotype for albinism. If albinism is exhibited only by the genotype aa, how many snakes out of a population of 100 would you expect to CARRY the albinism allele (so be Aa), but be normal color?
You conduct an RFLP analysis of head weight in one strain of cabbage;you determine that seven QTLs affect this trait. In anotherstrain of cabbage, you find that only four QTLs affect this trait.Note that both strains of cabbage are from the same species, althoughthey may have been subjected to different degrees of inbreeding.Explain how one strain can have seven QTLs andanother strain four QTLs for exactly the same trait. Is the secondstrain missing three genes?
Natural Selection Affects the Frequency of Genetic Disorders Will a recessive allele that is lethal in the homozygous condition ever be completely removed from a large population by natural selection?
Polymorphism of body color is caused by two alleles in a fly. One allele's homozygotes are brown, other homozygotes allele are pale, whereas heterozygotes have orange color. This is the observation made by the experimenters: brown: 100 pale: 100 orange: 50 find the genotype frequncy under hardy-weinberg equil. and then show the calcultaions to find the coefficient of inbredding for this locus.
Green dragons are known by Knights of the Realm to be cleverer and thus more dangerous than both red and brown dragons. Molecular evolutionary alchemists working for the king have determined that a gene called FIZBAN has an average dN/dS (nonsynonymous rate/synonymous rate) ratio of 1.06 in green dragons, compared to 0.66 and 0.44 in red and brown dragons, respectively. What type of selection is this gene under in each dragon species? What type of trait might this gene contribute to? Give an evolutionary history of this gene in green dragons, including principles of population genetics in your answer.
A population of ducks had dull orange bills and an average size of 18 inches from bill to tail. Over time, some researches noticed that the average size of the ducks was still 18 inches, but that now many ducks were either much smaller or much larger and no ducks were actually 18 inches long. The researcher correctly identified that the ducks were undergoing ___A___ selection for size, The researcher also noticed that the bills were a much brighter orange in the ducks, and correctly identified ____B____ selection for bill colouration. A few years later, the researcher returned and noticed that only the male ducks now had bright orange bills and the females were less bright. The researcher hypothesized that ____C____ selection was occurring. Question 4 options: 123 Disruptive 123 Sexual 123 Directional 1. A 2. B 3. C
Identifying genes like HMGA2 is important, because it is evidence of natural selection. How does it demonstrate that natural selection occurred in Darwin’s finches? Scientists mutate and modify the gene in the lab to see how changes might occur to the organism. Scientists identify different forms of the gene in individuals from the same species and observe how it shows up as a trait. Scientists study similar genes that also impact the same traits to see how they work together and influence one another. Scientists observe the frequency of the different forms of the gene and how it changes in response to the environment. Need some help on this one.
An anthropologist discovered that Papa New Guineans tribes that had given up the customs of cannibalism also had an avid aversion to grapefruit. The ability to taste the horrid bitterness of PTC present in grapefruit respectively human brain tissue is due to a dominant allele. A small tribe of 637 Papa New Guinea hens was tested by population geneticists the following results were displayed. Tasters Non-tasters Total Males 171 86 257 Females 337 43 380 Total 508 129 637 Another tribe, still being cannibals, trespassed the territory of the other aforementioned tribe. They captured killed and feasted on the brains of 50 PTC tasting males respectively 19 females as to access their abilities seen as a gift from gods. Calculate the increase/decrease in percentage units or percent of respective allele frequency displayed in the remaining tribe?
Does inbreeding affect allele frequencies? Why or why not? How does it affect genotype frequencies? With regard to rare recessive diseases, what are the consequences of inbreeding in human populations?
An island of the Galápagos archipelago is home to a medium ground finch that subsists mainly by eating seeds. A severe drought struck the island. During the drought, plants produced fewer seeds, and the finches soon depleted the stock of small and soft seeds, leaving only large and hard seeds that were difficult to process. In this environment, finches with deeper beaks were more likely to survive and pass their advantageous traits to their offspring by means of the principle called the 'inheritance of acquired characteristics'. Question 11 options: A) True B) False
Artificial selection is when people selectively choose individuals with a certain desired trait to use as parents of the next generation. It is done to domesticated (or semi-domesticated) organisms. It has produced such monstrosities as bubble-eyed goldfish, revealing the potential for selection acting on heritable variation to produce varieties appearing very different than their ancestors. How is that different from natural selection? (Select all that apply) A- In artificial selection, humans directly cause new mutations to occur, whereas natural selection relies on mutations that occur randomly over time. B- Artificial selection can lead to organisms that would be unfit to survive in the wild, whereas natural selection usually makes the population better adapted. C- Artificial selection is directed ahead of time towards an intentional goal; not so with natural selection. D- Really, they are exactly the same process. Both cause what seems to be design without a designer. E-…
Imagine that you travel around the world and find two populations of fish that look very similar, but one one population lives in a cold climate and is very cold-resistant (produces an antifreeze protein), while the other population lives in warm climate and is not cold-resistant (and does not produce the antifreeze protein). This is the kind of example that biologists try to explain, and think about whether it is due to phenotypic plasticity or selection. Let's think through this with a series of questions. Which of the following are true about phenotypic plasticity? answer choices A-A change in the phenotype through phenotypic plasticity allows organisms to adapt to their current environment (for example, from not being cold-resistant to being cold-resistant) B-The difference between the two phenotypes in question is based on an allelic difference between the two (for example, cold-resistant and not cold-resistant are based on two different alleles of the same gene) C-…