Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 19.6, Problem 2TYK
Populations that experience inbreeding may also experience
- a decrease in fitness due to an increased frequency of recessive genetic diseases.
- an increase in fitness due to increases in heterozygosity.
- very little genetic drift.
- no apparent change.
- increased mutation rates.
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Which of the following is not true for a critically endangered species?
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Loss of some allele from the species causing loss of genetic diversity with consequent inability to respond rapidly to
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Which of the following statements about genetic fitness and/or selection is false?
Group of answer choices
Individuals with low fitness have greater selection coefficients
Fitness involves both relative viability and reproductive success
Individuals with high fitness have greater selection coefficients
Selection against recessive alleles tends to be slower overall than dominant alleles because of the survival in heterozygotes
Hardy Weinberg equilibrium in a population refers to
Group of answer choices
equal numbers of females and males.
lack of mutations affecting the observed phenotypes.
equal numbers of dominant and recessive alleles.
unchanging allele frequencies in successive generations.
proportional numbers of each genotype.
Chapter 19 Solutions
Principles of Biology
Ch. 19.1 - Prob. 1TYKCh. 19.1 - Prob. 2TYKCh. 19.1 - The phrase an organism evolves is incorrect....Ch. 19.1 - Prob. 1BCCh. 19.2 - Explain how geography played a key role in the...Ch. 19.2 - Prob. 2CCCh. 19.2 - Prob. 3CCCh. 19.2 - Prob. 1TYKCh. 19.2 - Homologous traits show similarities because the...Ch. 19.3 - What is the frequency of pink flowers in a...
Ch. 19.3 - Prob. 1TYKCh. 19.3 - Prob. 2TYKCh. 19.4 - Lets suppose the climate on an island abruptly...Ch. 19.4 - Prob. 2CCCh. 19.4 - Prob. 3CCCh. 19.4 - Prob. 4CCCh. 19.4 - Prob. 1TYKCh. 19.4 - Prob. 2TYKCh. 19.4 - Prob. 3TYKCh. 19.5 - How does the bottleneck effect undermine the...Ch. 19.5 - Prob. 1TYKCh. 19.5 - Prob. 2TYKCh. 19.5 - Prob. 1BCCh. 19.6 - How does migration affect the genetic compositions...Ch. 19.6 - Prob. 1BCCh. 19.6 - Prob. 1TYKCh. 19.6 - Populations that experience inbreeding may also...Ch. 19 - Prob. 1TYCh. 19 - An evolutionary change in which a population of...Ch. 19 - Homology occurs because different species occupy...Ch. 19 - Prob. 4TYCh. 19 - Prob. 5TYCh. 19 - Prob. 6TYCh. 19 - Prob. 7TYCh. 19 - Prob. 8TYCh. 19 - Prob. 9TYCh. 19 - The micro-evolutionary factor most sensitive to...Ch. 19 - Prob. 1CCQCh. 19 - Prob. 2CCQCh. 19 - A principle of biology is that populations of...Ch. 19 - Prob. 1CBQCh. 19 - Prob. 2CBQ
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- When a population is at Hardy-Weinberg equilibrium which one of the following is true? Group of answer choices Genotypic frequencies change generation after generation. One can calculate the recessive allele frequency directly from the number of homozygous recessive phenotypes seen. Individuals of the same genotype are most likely to mate. Allele frequencies change generation after generation.arrow_forwardWhich of the following is a FALSE statement? Inbreeding non-random mating will increase the number of homozygotes. Directional selection will decrease genetic variation. Migration will decrease genetic variation between populations. Genetic drift will decrease genetic variation between populations. Mutation will increase genetic variation.arrow_forwardThe small remaining cheetah populations in the world are at risk of inbreeding depression . Which one or more of the following is true about inbreeding depression ? It is the result of reproduction in closely related individuals . It can increase the likelihood of recessive genetic diseases . It results in more variation in alleles . Answers a and b are both true . Answers a and d about both true .arrow_forward
- It is estimated that every human carries at least one recessive lethal allele (i.e. they are heterozygotes at that locus). What maintains these alleles in populations given their lethality when homozygous? Group of answer choices heterozygote disadvantage mutation/selection balance inbreeding genetic driftarrow_forwardOne of the dangers faced by a bottlenecked population is: Loss of genetic diversity and increased inbreeding Random changes in allele frequencies Gene flow Too much genetic diversityarrow_forwardThe 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.arrow_forward
- Which of the following is a TRUE statement? Non-random mating will increase the number of heterozygotes. Genetic drift within a population will increase genetic variation. Migration into the population will decrease genetic variation. Mutation will decrease genetic variation. Stabilizing selection will increase genetic variation.arrow_forwardFounder effects are most prominent in geographically, culturally or religiously isolated populations that undergo rapid expansion from a limited number of ancestors, when, as a consequence of low genetic diversity, some alleles become more frequent. True Falsearrow_forwardWhich of the following is NOT a potentially negative impact of genetic drift in a population? Maladaptive alleles could become fixed Populations might become homogenised, slowing down speciation A loss of genetic diversity leaves populations more vulnerable to environmental changes A loss of genetic diversity increases the probability that a population will be subject to inbreeding depressionarrow_forward
- Which of the following statements regarding selection is true? Incorrect answer - selection will always result in a change in allele frequencies. Correct Answer - The direction and magnitude of allele frequency change due to selection can be predicted. Question: Please explain in detail why the correct answer is correct and please explain why the incorrect answer is not correct.arrow_forwardTRUE/FALSE. Disruptive selection creates alleles that increase genetic diversity in a population. If false explain why and if true explain whyarrow_forwardGenetic drift: is variation in the relative frequency of different genotypes in a small population, owing to the chance disappearance of particular genes as individuals die or do not reproduce. is the same as the process of natural selection. does not rely on chance. cannot explain variation in genotypes within populations.arrow_forward
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