How can negative traits that don't show up until old age continue in populations? (Why aren't they eliminated through natural selection?) As part of your answer, provide an example.
Q: Why the impact of genetic drift is more significant in smaller population?
A: "Genetic drift" is one of the four processes that help drive evolution. It is defined as a shift in…
Q: Give at least one example of why certain complicated qualities are also known as quantitative…
A: Quantitative trait - is a measurable phenotype that depends on the cumulative actions of many genes…
Q: 500 pea plants are growing in your garden. 400 of them are yellow, with half of them being…
A: Hardy Weinberg principle is applied to the fixed populations.
Q: If a gene with two alleles, F and f, evolves so that the frequency of the recessive f = 1, what is…
A: The Hardy-Weinberg equilibrium is a rule expressing that the hereditary variation in a populace will…
Q: what is the meaning of fitness ?what two things do you suppose govern the rate of evolution by…
A: The process through which populations of living creatures adapt and evolve is known as natural…
Q: In a large population, dairy cows were selected for high milk production. What do you expect to…
A: Genetic selection for generations results in accumulation of beneficial genes into the organism from…
Q: Is it true that natural selection allows only the better alleles to be passed onto the next…
A: Darwin stated the theory of natural selection in which he gave the following arguments: First, he…
Q: Allele frequencies in a population should remain constant unless one or more factors cause those…
A: Evolution is a steady phenomenon which causes transformation in life from simple one to much more…
Q: What are fixed alleles, how do they affect population? Example provided please
A: An alternative form of a gene is termed as an allele. Generally, a gene possesses two alleles,…
Q: On average, genetic drift results in genetic diversity over time.
A: Genetic drift is the change in the frequency of an existing gene variant in a population due to…
Q: Explain why genetic drift is more powerful in small populations
A: Genetic drift is a change in a breeding population's allele frequency, and is one of the four…
Q: Applying Hamilton’s Rule, will natural selection favor helping a half sibling if the incremental…
A: According to Hamilton's rule, kin selection causes genes to increase in the frequency when the…
Q: Are dominant traits always more frequent in a population than recessive traits? Is that what…
A: Humans carry 2 copies of each gene on 2 copies of chromosome. Hence the different versions of the…
Q: Most new mutations are detrimental, yet rare beneficial mutations canbe adaptive. With regard to the…
A: Mutations are nonrandom and no directional, sometimes mutations may be beneficial, but most of the…
Q: How does natural selection change allele frequencies in populations? A. Natural selection controls…
A: Natural selection is one process of evolution. According to this process, some traits are naturally…
Q: In which of these examples can natural selection act on a trait and cause the population to evolve?…
A: There are several phenomena that lead to evolution of a population. For example genetic drift and…
Q: population is polymorphic for a trait if it is governed by two alleles and if the alleles are…
A: C) greater than 1%
Q: Biologists classify specific forms of traits as good or bad. For example, long tails in cats could…
A: "Genetics" is the study of the functioning and main codes of variation and heredity. Inheritance is…
Q: How does heterozygote superiority (aka overdominance) differ from underdominance? In your answer…
A: Dominance It is ability of an allele to show its phenotype even in the heterozygous condition, while…
Q: The evolution of a qualitative trait in reponse to natural selection is described by the following…
A: R= h2 S is known as the univariate breeder’s equation, it is simply an equation that represents the…
Q: Do the following examples describe directional, disruptive, balancing, or stabilizing selection?…
A: Gene pool is a collection of all the genes found in a population. Within a gene pool, each gene type…
Q: What is Natural Selection? A. Inherited traits change over time. B. Organisms develop traits that…
A: The process of natural selection and speciation are studied by students in order to understand the…
Q: the meaning of fitness ?what two things do you suppose govern the rate of evolution by natural…
A: The term "evolution" describes the gradual, generational changes that take place in the inherited…
Q: You have already learned that mutation is one source of variation in a population. Based on what you…
A: The changes in the genes because of any reason are termed genetic variation. It leads to a change in…
Q: Explain why the genetic structure of populations changes across space and time?
A: Structure of Population -- Statistical study of population and how they change over time is called…
Q: Natural selection means that the environment favors survival of some genotypes. From where does…
A: Natural selection can also give certain people a reproductive edge over others. Natural selection…
Q: Why is a balanced frequency of different alleles of a gene in a population more useful for the…
A: Introduction :- A variable form of a gene is known as an allele. Some genes exist in several…
Q: In genetics, what does the term population mean? Pick any species you like and describe how its…
A: Genetics is a branch of biology, dealing with differences and resemblances of related organisms…
Q: Do you think genetic drift would happen more quickly on an island or on the mainland? Justify your…
A: In population genetics, the population is represented in the form of alleles that codes for the…
Q: Harmful alleles persist in some populations, explain how this is possible with natural selection…
A: A harmful gene can persist in the population for a variety of reasons. The gene is helpful in some…
Q: Because of a genetic variation in the population what is a possible outcome?
A: The diversity in gene frequency among individuals or differences between population is referred to…
Q: The inability to fold your tongue is an autosomal recessive trait. Assuming that the population…
A: For, population in Hardy equilibrium, P 2 + 2pq + q 2 = 1, and p +q = 1 where, p =…
Q: In a population, the dominant phenotype of a certain trait occurs 91% of the time. What is the…
A: Hardy Weinberg equilibrium suggests that the population is ideal. There are not found any selection,…
Q: Statement A: Natural selection creates new traits. Statement B: Natural selection increases or…
A: Natural selection is the process in which heritable traits that make it more likely for organisms to…
Q: What happens to the number of alleles in the gene pool of a population?
A: The term "gene pool" indicates a population's extensive genetic variety. The wider the gene pool,…
Q: In population genetics, evolution describes how _______ change from one generation to the next.
A: The population genetics deals with the genetical difference between the individuals of a population…
Q: Considering the principles of mutation , natural selection , and genetic drift do you expect…
A: Introduction: A change in allelic in a population that occurs by chance from generation to…
Q: How do we know how much genetic variation is in a population?
A: To find: How much genetic variation is in a population
Q: Deleterious recessive alleles, such as the allele that causes cystic fibrosis, can persist in a…
A: Harmful or disease causing alleles are often recessive alleles. These can be inherited from…
Q: Why do traits have to be heritable in order for evolution by natural selection t
A: Traits are genetically determined characteristics precisely phenotypic characteristics. Natural…
Q: How would you respond to someone who said that models are useless in studying population genetics…
A: Population genetics involves the study of genetic difference within the population. It involves the…
Q: Which of the following is a reason we see continuous, quantitative traits like weight? -…
A: Quantitative traits are traits for which phenotypic variation is continuously distributed in natural…
Q: Derived traits are essentially mutations that were selected for (by natural selection) and thus…
A: Cladistics analyses also known as phylogenetic analysis is used to classify the organisms on the…
Q: • List 4 sources of genetic variation and explain how each source contributes to genetic variation •…
A: Population evolution Evolution is a prpcess of change and adoption for better survival in the…
Q: What do you think would be the genetic and evolutionary consequences to the population if it was not…
A: Natural selection is an evolutionary process that helps an organism to survive or adapt according to…
Q: Natural selection is dependent on several factors, including the ability a population to survive and…
A: Natural selection:It can be defined as an evolutionary mechanism by which the organisms that are…
Q: Albinism is a recessive trait controlled by a single gene. If the frequency of albinos in a…
A: According to the Hardy-Weinberg equilibrium, the frequencies of the alleles and genotypes in a…
Q: What is the importance of heritability in natural selection?
A: Introduction In breeding and genetics, the term "heritability" refers to a statistic that…
Q: What is the importance of allele separation in addition to reintroducing recessive alleles to…
A: Introduction Genes are basic units of inheritance. Gene is a specific sequence of DNA that encodes…
Q: Which of the following is an example of genetic drift? Group of answer choices A-As global…
A: Alleles are the variants of a gene and bring about diversity within as well as among the species.…
Step by step
Solved in 2 steps
- In a population of lizards, color is genetically determined. The current population has two two phenotypes: blue and yellow. Which of the following scenarios could result in evolution by migration? O A disease indiscriminately reduces the population by 90%. Birds are better able to see and therefor prey on blue lizards The population is joined by individuals from a nearby population that has an allele for a red phenotype. Females preferentially mate with individuals exhibiting the blue phenotype.Which of the following is not true of natural selection? (a) natural selection acts to preserve favorable traits and eliminate unfavorable traits (b) the offspring of individuals that are better adapted to the environment will make up a larger proportion of the next generation (c) natural selection directs the course of evolution by preserving the traits acquired during an individuals lifetime (d) natural selection acts on a populations genetic variability, which arises through mutation (e) natural selection may result in changes in allele frequencies in a populationThe reason spontaneous mutations do not have an immediate effect on allele frequencies in a large population is that: a. mutations are random events, and mutations may be eitherbeneficial or harmful. b. mutations usually occur in males and have little effect oneggs. c. many mutations exert their effects after an organism hasstopped reproducing. d. mutations are so rare that mutated alleles are greatlyoutnumbered by nonmutated alleles. e. most mutations do not change the amino acid sequence of aprotein.
- In a particular population of mice, certain individualsdisplay a phenotype called short tail, which is inherited as a dominant trait. Some individuals display arecessive trait called dilute, which affects coat color.Which of these traits would be easier to eliminatefrom the population by selective breeding? Why?@ 2 W S Rehpogs are mythical creatures. They are small and not very smart. Rehpogs live on the ground in a flat, warm habitat. Their fur texture and color ranges from thick purple fur to thin pink fur, depending on allele distribution. The dominant fur allele (R) codes for thick purple fur. The recessive allele (r) codes for thin pink fur. REMEMBER: a phenotype (fur color) is the physical expression of a genotype (two- letter code for the alleles present in that individual). Each individual has two alleles for fur color: X RR genotype is homozygous dominant = Thick purple fur phenotype Rr genotype is heterozygous = Thick purple fur (because of the presence of one dominant allele) rr genotype is homozygous recessive = Thin pink fur (because of the absence of a dominant allele) For the purposes of this experiment, Rehpogs mate once per year and produce two offspring each year. Rehpogs are monogamous, faithful and fertile. # 3 e d C C $ 4 r f V % 5 t g Oll 6 b y h & 7 O 8 n JL u i j O L m…Three basic predictions underlie genetic drift in populations: (1) As long as the population size is finite,some level of genetic drift will occur; thus, withoutnew mutations, all variation will drift either to fixationor to loss. (2) Drift happens faster in small populationsthan in large populations. (3) The probability that anallele is fixed (goes to a frequency of 1.0) is equal toits initial frequency (p) in the population, while itsprobability of loss from the population due to drift isequal to 1 − p. Given these three predictions:a. What is the allele frequency of a new autosomalmutation immediately after it occurs in a diploidpopulation of size N = 100,000?b. What is the allele frequency of a new autosomalmutation immediately after it occurs in a diploidpopulation of size N = 10?c. In which population does the new mutation have ahigher probability of going to fixation by chancewith genetic drift?
- Consider the first copy of an allele for insecticideresistance that arises by mutation in a populationof insects exposed to an insecticide. Is this mutation an adaptation? If, after some generations,we find that most of the population is resistant,is the resistance an adaptation? If we discovergenetic variation for insecticide resistance in apopulation that has had no experience of insecticides, is the variation an adaptation? If an insectpopulation is polymorphic for two alleles, eachof which confers resistance against one of twopesticides that are alternately applied, is thevariation an adaptation? Or is each of the tworesistance traits an adaptation?Microevolution is defined as a change inallele frequencies in a population over generations. Please explainwhat an allele is, in genetic terms. Name the three major factorsinvolved in allele frequency changes in populations. Describe, indetail, how natural selection works on individuals, while evolutionoccurs in populations. Include a real or hypothetical example ofthe process of natural selection in your answer other thaninsects and insecticide! Identify the specific natural selectionpressure and the specific trait being selected for in yourexample.Most new mutations are detrimental, yet rare beneficial mutations canbe adaptive. With regard to the fate of new mutations, discuss whetheryou think it is more important for natural selection to select againstdetrimental alleles or to select in favor of beneficial ones. Which doyou think is more significant in human populations?
- If vestigial traits are no longer useful to an organism, why don't they evolve out of the population? * Individuals with the trait have developed new ways to use them. Individuals that have the trait continue to survive and reproduce, and they pass on th genes for that trait to the next generation. Individuals that have the trait must have some sort of evolutionary advantage. The individuals that have the trait become less common over time. Sign out US %23 24 96 &. back 2 3. 4. 8. e tab b n m shift ctri ctri alt1. 9. You are a genetiCıst studying a population of 100 barn swallows. You are particularly interested in one gene, and upon examining the alleles present, you find one allele is quite common, accounting for 80 of the alleles in this population. What is the frequency of this allele in the population? 4. 5. The ability to breathe fire in dragons is controlled by a single gene with two alleles. The fire-breathing allele (F) is dominant to the non-fire breathing allele (f). In a population of 600 dragons, 150 dragons are non-fire breathing (ff) and the rest can breathe fire (either FF or Ff) The population is in Hardy-Weinberg equilibrium. The frequency of the dominant allele (F) is represented by "p and the frequency of the recessive allele (f) is represented by "q". Recall the allele frequency is p+ q = 1 and the Hardy-Weinburg equation is p2 + 2pq + q2 = 1 (2 pts). What is the frequency of the recessive allele (f)? Hint: you can figure out the frequency of ff, which is equal to q2, but…1. Based on the class data from Experiment I, for each of the three populations, describethe effect of population size on genetic diversity over time. Your answer should touchon the magnitude of any genetic changes through time for each of the three populationsizes.