BROOKER BIOLOGY
5th Edition
ISBN: 9781307656152
Author: BROOKER
Publisher: MCG/CREATE
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Chapter 24, Problem 3TY
Summary Introduction
Introduction: The form of reproductive isolation that prevents the process of fertilization is called a prezygotic isolation method. Whereas, the method that does not allow the production of fertile offspring is called postzygotic isolation mechanism.
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Identify each of the following reproductive barriers as prezygotic or postzygotic. a. One lilac species lives on acidic soil, another on basic soil. b. Mallard and pintail ducks mate at different times of the year. c. Two species of leopard frogs have different mating calls. d. Hybrid offspring of two species of jimsonweed always die before reproducing. e. Pollen of one kind of pine tree cannot fertilize another kind.
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a. Post zygotic barrier b.Habitat isolation c.Mechanical isolation d.Pre zygotic barrier e.Hybrid breakdown
In humans, mammals and many other chordates sexual reproduction takes place by
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Chapter 24 Solutions
BROOKER BIOLOGY
Ch. 24.1 - Can you think of another example of two different...Ch. 24.1 - Prob. 1CSCh. 24.1 - Is temporal isolation an example of a prezygotic...Ch. 24.1 - Prob. 3CCCh. 24.2 - Prob. 1CSCh. 24.2 - Prob. 1EQCh. 24.2 - Prob. 2EQCh. 24.2 - Prob. 3EQCh. 24.2 - Prob. 1CCCh. 24.2 - Prob. 2CC
Ch. 24.4 - Evo-Devo: Evolutionary Developmental Biology...Ch. 24.4 - Prob. 1CSCh. 24.4 - Prob. 2CCCh. 24 - Macroevolution refers to evolutionary changes that...Ch. 24 - Prob. 2TYCh. 24 - Prob. 3TYCh. 24 - Prob. 4TYCh. 24 - Prob. 5TYCh. 24 - Prob. 6TYCh. 24 - Prob. 7TYCh. 24 - Prob. 8TYCh. 24 - Prob. 9TYCh. 24 - Prob. 10TYCh. 24 - What is the key difference between prezygotic and...Ch. 24 - What are the key differences between gradualism...Ch. 24 - Prob. 3CQCh. 24 - Prob. 1COQCh. 24 - Discuss the type of speciation (allopatric or...
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- A prezygotic barrier prevents (a) the union of egg and sperm (b) reproductive success by an interspecific hybrid (c) the development of the zygote into an embryo (d) allopolyploidy from occurring (e) changes in allometric growtharrow_forwardMembers of two separate species mate and produce hybrid offspring that fail to thrive in the environment. The hybrid genotypes do not suit the hybrid organism for survival using any given niche. Eventually, the hybrid genotypes disappear from the environment. This would be due to: A. hybrid inviability B. hybrid sterility C. gametic incompatibility D. pre-zygotic isolation E. infra-gametic disruptionarrow_forwardThe phenomenon of ____ results from the unequal size of the male and female gametes and the markedly different amounts of parental investment in the resulting offspring. As a result of this phenomenon, females tend to be the choosier sex in most vertebrate species. A. anisogamy B. isogamy C. isostacy D. pleiotropy E. heterogeneityarrow_forward
- We learned from hermaphroditic snails in New Zealand and C. elegans that populations that are undergo both sexual and asexual reproduction in the same population can alter the frequency of outcrossing resulting in changes in genetic diversity. Identify the statement that accurately reflects a real result. a. Sexual reproduction prevents the ability of snails and worms to coevolve with their parasites. b. Sexual reproduction frequency increases in the presence of a stressor, like pathogens and parasites. c. Asexual reproduction is favored when there are pathogens and parasites in the environment. d. Asexual reproduction enables the Red Queen hypothesis to play out and enable the pathogen to win.arrow_forwardWrite the definition of the following terms: 1. Semelparous life history 2. Iterous species 3. Senescence 4. Antagonistic pleiotropy 5. Carrying capacityarrow_forwardWhich of the following assumptions is NOT part of Hardy-Weinberg principle? a. no geneflow b. no mutation c. Allelic frequencies are the same in males and females d. mating is nonrandomarrow_forward
- 2) In some Drosophila species, conditions in the female reproductive tract do not allow the sperm of other species to survive long enough for fertilization to occur. What mechanism of reproductive isolation is in operation in this example? a.Temporal isolation. b.Mechanical isolation. c.Low hybrid viability. d.Gametic isolation.arrow_forward17) Imagine the recessive allele of gene B above is a beneficial trait for individuals of the species to have, but the recessive allele of the C gene is detrimental. Imagine also, you only have two individuals from which you wish to build a successful population: one is homozygous dominant for the two genes and the other homozygous recessive for the two genes. Considering the table of recombination rates above, if you mate these two individuals, what percentage of the resulting offspring will have both beneficial alleles? 18) Theoretically speaking, we should not be able to observe a recombination rate greater than 50%. Why is this so? If we measure a recombination rate of 50% what does it mean? 19) Create a chromosome linkage map for the seven genes provided. Numbers represent the recombination rates among offspring who have parents who are each pure-bred for the alleles of genes described. Assuming the gene for eye color is 25 map units from the end of the chromosome, provide a list…arrow_forwardWhich of the following traits is more associated with an Opportunistic (Equilibrial) species? Which of the following traits is more associated with an Opportunistic (Equilibrial) species? A. Short maturation time B. Producing offspring at many different times over the course of life C. Producing a lot of eggs at one time D. High juvenile mortality E. High level of parental carearrow_forward
- Of the following, which is an example of a postzygotic barrier? O Due to incompatible interactions between inherited genes, a hybrid fetus is unable to develop, and is aborted. O One species mates in spring, while another mates in summer. O A female spider of one species does not respond to the mating display of a male of a closely related species. O Cell surface proteins of one species eggs prevent sperm from another species attaching, so the sperm cannot fertilize it.arrow_forwardIdentify the most accurate statement about population variation. a. Allopolyploidy occurs when chromosomes fail to separate during gametogenesis and then self-fertilization results in a tetraploid offspring. b. Chromosomal duplications and deletions cause large changes due to the changes in gene dosage. c. Traits that are influenced by both environment and genetics are unlikely to be influenced by evolution. d. Gene duplications and deletions occur frequently during equal crossing over that occurs during meiosis I.arrow_forwardThe twofold cost of sex model by John Mynard Smith explains how - A. asexual females can become predominant in a population. B. anisogamy results in sexual reproduction. C. sexual individuals can produce genetically variant offspring. D. asexual females invest as much in offspring as the sexual females.arrow_forward
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