Imagine a population of beetles living in someone's backyard. The beetles inhabit several different areas of the backyard, including the garden, patio, and storage shed. One day, the owners spray the garden with insecticide, killing off about half of the beetle population. What effect will this have on genetic variation and what evolutionary force is this an example of? Group of answer choices Reduces variation; genetic drift Increases variation; natural selection Reduces variation; natural selection Increases variation; genetic drift

Imagine a population of beetles living in someone's backyard. The beetles inhabit several different areas of the backyard, including the garden, patio, and storage shed. One day, the owners spray the garden with insecticide, killing off about half of the beetle population. What effect will this have on genetic variation and what evolutionary force is this an example of? Group of answer choices Reduces variation; genetic drift Increases variation; natural selection Reduces variation; natural selection Increases variation; genetic drift

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter11: Evolution And Its Processes

Section: Chapter Questions

Problem 7RQ: In which of the following pairs do both evolutionary processes introduce new genetic variation into...

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In which of the following pairs do both evolutionary processes introduce new genetic variation into a population? a. natural selection and genetic drift b. mutation and gene flow c. natural selection and gene flow d. gene flow and genetic drift
In which of the following pairs do both evolutionary processes introduce new genetic variation into a population?a. natural selection and genetic driftb. mutation and gene flowc. natural selection and gene flowd. gene flow and genetic drift
The Hardy–Weinberg principle states that allele and genotype frequencies remain constant from one generation to the next, as long as specific conditions are met.Choose Yes or No for the conditions that must be met from the provided statements below. Mutations are exponentially occurring. All members of the population breed. Everyone produces the same number of offspring. The population is infinitely large. There is no migration in or out of the population. No net mutations are occurring. Natural selection of beneficial traits is occurring. Natural selection is not occurring. All mating is completely random. Offspring are able to migrate out of the population.
"In a population, with time the frequency of some alleles/genotypes decreases" describes... Group of answer choices Evolution by natural selection Evolution by genetic drift Any evolution Any phenotypic plasticity
Natural selection acts upon ____________________________, evolution upon _______________________________. What is the gene pool and how does natural selection act upon it? If a version of a gene confers an advantage to survival and reproduction, that version of the gene will be favored by natural selection and we can expect the frequency of that gene to ______________________ within the population over time. Versions of the gene that do not confer an advantage (or confer a disadvantage) should become _______________ prevalent . This generation to generation change in the gene pool is called ________________________. Changes to the genetic makeup of a population and the individuals within it can arise via two mechanisms. List and describe both. Both of these processes are ________________________________. Once created, new combinations of genes will be acted upon by _________new alleles_______________________. How is Darwinian “fitness” different than the typical definition used in…
In the modern reckoning of evolution by natural selection, what is the most important feature that allows an allele to be more represented over time in a population? The allele makes the organisim stronger. The allele allows the organisim to produce more breeding offspring. The allele allows the organisim to eat more readily. The allele allows the organsims to escape predators readily.
Each of the following has a better chance of influencing genotype frequencies in small populations than in large populations, but which one has the greatest influence in small populations? Group of answer choices Non-random mating Natural selection Gene flow Genetic drift Mutation PreviousNext
Imagine a population of pea plants growing in Petaluma. 50% of the gene pool is P alleles, for purple flowers and 50% is p alleles, for white flowers. How can the frequency of the alleles change in this population over generations? Select all the correct answers. Group of answer choices genetic drift natural selection mutation gene flow
Evolution is a change in frequencies of alleles in the gene pool of a population. This definition of evolution was developed a result of the work in the 20th century by Hardy and Weinberg. Through mathematical modeling based on probability, they concluded that allele and genotype frequencies in a population will remain constant from generation to generation absence of evolutionary influences. Evolution will not occur in a population if seven conditions are met: 1. mutation is not occurring 2. natural selection is not occurring 3. the population is infinitely large 4. all members of the population breed 5. mating is totally random 6. everyone produces the same number of offspring 7. there is migration in or out of the population One of the criteria in the prompt above has been mis-typed. Correct the erroneous phrase so evolution will NOT occur.A) (5) There is sexual selection.B) (1) Mutation occurs within the population.C) (4) The fittest members of the population breed.D) (7)…
Genetic drift differs from gene flow in that Group of answer choices genetic drift occurs at a steady, but low, rate in all populations while gene flow is largely random event occurring in small populations. genetic drift is most likely to produce a loss of genetic diversity in a population whereas gene flow will often increase genetic diversity in a population. none of these choices adequately describe the difference between genetic drift and gene flow. genetic drift is based on female choice of particular mates but gene flow is largely a product of natural selection.
The domestication or breeding of animals to have as pets, livestock on farms, or for work purposes is a form of artificial selection. Charles Darwin used these practices to support his theory of species change by natural selection. How is artificial selection similar to natural selection? When animals with favorable traits are bred with animals with unfavorable traits, the offspring will have favorable traits, so breeders were changing species by removing certain traits. For artificial selection to work, only the strong survive to reproduce. By breeding animals with specific traits, breeders were able to produce a wide variety of breeds within a short period of time. Artificial selection involves breeding two different species and determining if a hybrid organism can be produced.
What is the role of variation in evolution. If heterozygosity is reduced, what happens to the potential for evolution?. The phenotype and genotype bof a population is die to a mosaic of random and directed processes, some of them have to do with history ;some are related to adaptation, etc. As completely as possible, discuss the role of chance and direction in evolution and in determining the phenotype of a population