Biology: Science for Life with Physiology (6th Edition) (Belk, Border & Maier, The Biology: Science for Life Series, 5th Edition)
6th Edition
ISBN: 9780134555430
Author: Colleen Belk, Virginia Borden Maier
Publisher: PEARSON
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Chapter 12, Problem 6LTB
Summary Introduction
Introduction:
Evolution may occur through several mechanisms like genetic drift, mutation and migration. In natural selection, the fittest organism is selected naturally. Natural selection is the key mechanism of evolution, which is the change in inherited traits or characteristics of a population over generations.
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The magnification of genetic drift as a result of natural events or catastrophes is _____; _____ is the flow of alleles in and out of a population due to the migration of individuals or gametes.
(Following Question 25) If a mutation occurred such that A2 allele appeared in this population. The new allele has the effect of reproducing one year earlier but at the cost of not being able to reproduce after age 6. Can A2 allele be selected for and subsequently fixed in the population?
Yes, because A2 allele exhibits the antagonistic pleiotropic effect.
Yes, because carriers of the A2 allele have a higher expected lifetime reproductive success than the individuals carrying the A1 allele.
No, because carriers of the A2 allele live fast, therefore they will always die young.
No, because the carriers of the A2 allele have a lower expected lifetime reproductive success. Therefore, the A2 allele is a deleterious allele.
Not enough information in this problem that would allow us to make an informed prediction.
Natural selection results in the adaptation of organisms to the circumstances of their way of life and their environment
True or False
Chapter 12 Solutions
Biology: Science for Life with Physiology (6th Edition) (Belk, Border & Maier, The Biology: Science for Life Series, 5th Edition)
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- A difference in survival and reproduction among members of a population that vary in one or more traits is called ________.arrow_forwardA change in structure, behavior, or physiology that enhances survival, and reproductive success in a particular environment is called _________. Genetic drift Mimcry Adaptation Gene flowarrow_forwardPlease Answer for eacharrow_forward
- Enculturation is A process by which we learn our culture A process by which an organism evolves A process by which a group of organisms increases genetic diversity None of the abovearrow_forwardGene frequency is the percentage of a population that carries a particular allele located in a locus. True Falsearrow_forwardA small community that is heavily infested with mosquitoes was sprayed weekly with the insecticide DDT for several months. Daily counts providing information on mosquito population size are represented in the graph below. Provide a biological explanation for the changes in the mosquito population over time. Use the terms: insecticide resistance/resistant, natural selection, favorable trait, reproduce, mutation/sexual reproduction Use this sentence starter: At the beginning the daily mosquito count (increased/decreased) until month _, then it started to (increase/decrease). This occurred because.. Use NUMBERS FROM THE GRAPHarrow_forward
- What force, which changes gene frequencies, occurs if there is a failure to reproduce or if individuals become isolated from the rest of their population? mutation radiation genetic drift nonrandom matingarrow_forwardThe arrows in the top says GREATER GENETIC INFLUENCE and on the bottom it says GREATER ENVIRONMENTAL INFLUENCE. There should be no reason for u to not doing this question. I provided a clear graph. DO NOT COPY from google use the graph to answer those question USING THOSE TWO vocabulary words.arrow_forwardGenetic variation. arises in response to changes in the environment. is created by the direct action of natural aelection. tends to be reduced when diploid organiama produce gametes. must be present in a population before natural selection can act upon the population. 00arrow_forward
- Which of the following is the degree of an organism’s adaptation to an environment, as measured by an individual’s relative genetic contribution to future generations? Fitness Lineage Adaptationarrow_forwardAs evolution is the change in allele frequency in a population over time … Explain the evolution of bacteria in terms of changes to the frequency of the NDM-1 gene.arrow_forwardA scientist claims that pneumonia causes weight loss in mice. The table shows the weights (in grams) of six mice before infection and two days after infection. At alphaαequals=0.10, is there enough evidence to support the scientist's claim? Assume the samples are random and dependent, and the population is normally distributed. Complete parts (a) through (e) below. Mouse 1 2 3 4 5 6 Weight (before) 22.9 19.1 23.6 21.2 23.2 21.7 Weight (after) 21.4 18.3 22.9 20.9 22.1 20.8 (a) Identify the claim and state Upper H 0H0 and Upper H Subscript aHa. What is the claim? A. Pneumonia causes weight loss in mice. B. Pneumonia causes weight gain in mice. C. Weight loss causes pneumonia in mice. D. Weight gain causes pneumonia in mice. Let mu Subscript dμd be the hypothesized mean of the difference in the weights (beforeminus−after). What are Upper H 0H0 and Upper H Subscript…arrow_forward
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