Campbell Biology Plus Masteringbiology
10th Edition
ISBN: 9780321775849
Author: Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
Publisher: PEARSON
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Chapter 24, Problem 11TYU
WRITE ABOUT A THEME: INFORMATION In sexually reproducing species, each individual inherits DNA from both parent organisms. In a short essay (100-150 words), apply this idea to what occurs when organisms of two species that have homologous chromosomes mate and produce (F2) hybrid offspring. What percentage of the DNA in the F1 hybrids' Chromosomes comes from each parent species? As the hybrids mate and produce F2 and later-generation hybrid offspring, describe how recombination and natural selection may affect whether the DNA in hybrid chromosomes is derived from one parent species or the other.
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Wyckoff et al. (2000. Nature 403:304-309) have proposed that some human male
reproductive-associated genes have evolved by natural selection and not by neutral evolution. Part of the DNA sequence results of their study is shown below. Which gene(s) did seem to evolve by natural selection? Note: dn = number of substitutions per non-synonymous (replacement) sites and ds = number of substitutions per synonymous (silent) sites.
dn ds
Acrosin-Trypsin 0.138 0.064
Protamine 1 0.133 0.046
SRY 0.055 0.090
Histone H1 (testicular) 0.055…
The continuity of life is based on heritable information in the form of DNA. In a short essay (100–150 words), explain how chromosome behavior during sexual reproduction in animals ensures perpetuation of parental traits in offspring and, at the same time, genetic variation among offspring.
Which of the following statements is an evolutionary advantage of sex and sexual reproduction?
A. Sex and recombination results in decreased genetic variation in a population and maintains advantageous traits.
B. Sex and recombination can bring beneficial alleles together when producing offspring.
C. Sex and recombination results in the inheritance of all the genetic information available from both parents.
D. Reproduction is less risky when gametes from two individuals must fuse.
Chapter 24 Solutions
Campbell Biology Plus Masteringbiology
Ch. 24.1 - Prob. 1CCCh. 24.1 - WHAT IF? Suppose two bird species live in a...Ch. 24.2 - Summarize key differences between allopatric and...Ch. 24.2 - Prob. 2CCCh. 24.2 - WHAT IF? Is allopatric speciation more likely to...Ch. 24.2 - MAKE CONNECTIONS Review the process of meiosis in...Ch. 24.3 - 1. What are hybrid zones, and why can they be...Ch. 24.3 - WHAT IF? Consider two species that diverged while...Ch. 24.4 - Speciation can occur rapidly between diverging...Ch. 24.4 - Prob. 2CC
Ch. 24.4 - Prob. 3CCCh. 24 - Explain the role of gene flow in the biological...Ch. 24 - Can factors that cause sympatric speciation also...Ch. 24 - What factors can support the long-term stability...Ch. 24 - Is speciation something that happened only in the...Ch. 24 - The largest unit within which gene flow can...Ch. 24 - Prob. 2TYUCh. 24 - Prob. 3TYUCh. 24 - Prob. 4TYUCh. 24 - Which of the following factors would not...Ch. 24 - Plant species A has a diploid chromosome number of...Ch. 24 - Prob. 7TYUCh. 24 - SCIENTIFIC INQUIRY DRAW IT In this chapter, you...Ch. 24 - Prob. 9TYUCh. 24 - Prob. 10TYUCh. 24 - WRITE ABOUT A THEME: INFORMATION In sexually...Ch. 24 - Prob. 12TYU
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- VISUALIZE Use two different colors to depict the unduplicated chromosomes of species C with larger chromosomes (2n = 8) and species D with slightly smaller chromosomes (2n = 10), and of their F1 hybrid. Is the hybrid likely to be fertile?arrow_forwardAs pointed out in the section Evolution of the Y Chromosome, some researchers have predicted that the human Y chromosome will continue to lose genetic information in the future and will completely disappear from the species in about 10 million years. What would happen if the Y chromosome disappeared from the human species?arrow_forwardDescribe thoroughly the selective advantages and disadvantages organisms that reproduce sexually have over those that reproduce asexually, as well as the ramifications of mate choice on the traits present in species. The following questions could help answer the question above. What are the advantages of sexual reproduction? What are the disadvantages? How do traits selected by sexual selection and those selected by differential survival mix in an animal species? i.e. is it more important to mate or survive? Use specific examples to illustrate your point. Your answers should indicate an understanding of the mechanism behind natural selection. Propose a scenario where asexual reproduction would be favorable.arrow_forward
- Chromosomal rearrangements are a source for reproductive barriers (low hybrid fitness) and are suppressors of recombination. The most commonly referred to rearrangements involved in human evolution are the formation of the Y chromosome and the variation of karyotypes between primates, especially the formation of human chromosome 2. Using the diagram below identify the types of chromosomal rearrangements and describe the impact on genotype.arrow_forwardIn eukaryotic species, sexual reproduction is the producer of genetic diversity. Describe three ways( and the stages they occur in) that Meosis and fertilization introduce new combinations of genes to organisms?arrow_forwardGlobal warming is an issue affecting many species around the world. Warming has caused the temperatures in lakes and rivers to increase and stay elevated for longer periods of time. Select the FOUR numbers that describe the possible effects of global warming on the reproduction of rainbow trout in the wild and on biodiversity. The extra set of chromosomes remains. The extra set of chromosomes is removed. The offspring are diploid (2n). The offspring are triploid (3n). The offspring cannot reproduce. The offspring can reproduce. Biodiversity decreases. Biodiversity increases. Please record the FOUR numbers in ascending order.arrow_forward
- What is one statement that would support the theory that all organisms are related? A) The genetic code is almost universal.B) All flies have 2 wings.C) Eukaryotes have mitochondria.D) Prokaryotes have circular chromosomes.E) That the Theory of Pangenesis has held up to scrutiny for thousands of years What is the difference between cross and self-fertilization? A. In cross-fertilization the gametes from one plant are used to fertilize the gametes of another plantB. In cross-fertilization the gametes from one plant are used to fertilize the gametes from the same plant C. In self-fertilization the gametes from one plant are used to fertilize the gametes from another plantD. In cross-fertilization insects are used to pollinate the plants while in self-fertilization the investigator pollinates the plantsarrow_forwardPlease answer fast 7. What is true about the strategy of selective breeding? Choosing parents with the best phenotypes to pass their alleles to their offspring Choosing parents with the greatest number of alleles to pass them to their offspring Choose parents with best alleles to pass them to their offspring Choosing parents with the best genotypes to pass their alleles to their offspring. 8. What best describes the relationship between genetic distance and frequency of recombination? Genes that are far apart have a 50% crossover rate The closer are the genes, the less crossover there is between them Double crossover makes the estimation of genetic distance difficult Crossover is the best way to estimate the genetic distance 9. You have a population of sheep; You want to start a selection program to maximize production of wool. What is the phenotypic feature that you would consider to pick the parents of the breeding program? Explain. 10. The difference between a…arrow_forwardc. Explain how this phenomenon relates to hybriddysgenesis, described in Problem 29 of Chapter 13.arrow_forward
- Scientists studying reproduction compared three closely related species of bagworm moths. The reproductive methods for these species are given in the table. Which of the following research questions would provide additional information about the population level impacts of meiosis and sexual reproduction? A - How do the number of D. charlottae offspring compare with the number of S. rupicolella offspring? B - Do D. charlottae and S. rupicolella populations express greater genetic diversity than D. fennicella populations? C - Are the offspring of D. fennicella genetically unique compared to the offspring of D. charlottae and S. rupicolella? D - Does crossing-over in D. fennicella result in increased genetic variation compared to D. charlottae and S. rupicolella?arrow_forwardExplain the below concept ? Meiosis Is Critical to Sexual Reproduction in All Diploid Organismsarrow_forwardWRITE ABOUT A THEME: INFORMATION The continuity oflife is based on heritable information in the form of DNA. In ashort essay (100–150 words), explain how chromosome behavior during sexual reproduction in animals ensures perpetuationof parental traits in offspring and, at the same time, geneticvariation among offspring.arrow_forward
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