All are true about reproductive isolation, except: A. Reproductive isolation hinders interbreeding of populations B. isolation or barrier can only occur before mating C. some hybrids can still reproduce Question: small and large species of dogs are difficult to breed and may not likely occur naturally because of their size difference, this is an example of: A. Geographic isolation B. Behavioral isolation C. temporal isolation D. Mechanical isolation

All are true about reproductive isolation, except: A. Reproductive isolation hinders interbreeding of populations B. isolation or barrier can only occur before mating C. some hybrids can still reproduce Question: small and large species of dogs are difficult to breed and may not likely occur naturally because of their size difference, this is an example of: A. Geographic isolation B. Behavioral isolation C. temporal isolation D. Mechanical isolation

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter20: Speciation And Macroevolution

Section: Chapter Questions

Problem 2TYU: The reproductive isolating mechanism in which two closely related species live in the same...

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Members 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 disruption
1. The North American garter snake (7Thamnophis) has a number of sympatric populations that can be either terrestrial or aquatic. Terrestrial populations generally do not interbreed with aquatic populations, despite living in sympatry, because they are most likely separated by which pre-zygotic barrier? A. allopatric isolation by means of vicariance B. gamete isolation C. mechanical isolation D. habitat isolation E. allopatric isolation by means of dispersal
1. The North American garter snake (Thamnophis) has a number of sympatric populations that can be either terrestrial or aquatic. Terrestrial populations generally do not interbreed with aquatic populations, despite living in sympatry, because they are most likely separated by which pre-zygotic barrier? A. allopatric isolation by means of vicariance B. gamete isolation C. mechanical isolation D. habitat isolation E. allopatric isolation by means of dispersal
1. The North American garter snake (7hamnophis) has a number of sympatric populations that can be either terrestrial or aquatic. Terrestrial populations generally do not interbreed with aquatic populations, despite living in sympatry, because they are most likely separated by which pre-zygotic barrier? A. allopatric isolation by means of vicariance B. gamete isolation C, mechanical isolation D. habitat isolation E. allopatric isolation by means of dispersal 2. Male dragonflies of one species are unable to grasp the abdomen of female dragonflies of a different species securely enough to mate, due to poor alignment of the four wings on each insect. This type of interference during mating attempts between different dragonfly species is: A. an example of a pre-zygotic barrier due to behavioral isolation B. an example of a pre-zygotic barrier due to gamete isolation C. an example of a pre-zygotic barrier due to mechanical isolation D. an example of a pre-zygotic barrier due to habitat…
When a male sea horse mates with a female leafy sea dragon (a closely related species), they produce fertile hybrids. Breeding studies have shown that offspring of the hybrids are infertile. This is an example of: A Hybrid breakdown B Hybrid infertility C Hybrid inviability D Gametic isolation O EA and D
Which of the following would be a good example of premating reproductive isolation? A. Cross-fertilizations between the gray treefrogs, Hyla versicolor and H. chrysoscelis result in a high degree of mortality prior to hatching of hybrid eggs. B. The mule, a hybrid between horses and donkeys is viable, but sterile. C. Males of H. versicolor produce an advertisement call with a much slower pulse rate than males of H. chrysoscelis and females use pulse rate differences to avoid mating with the wrong species. D. Hybrid offspring are produced from matings between leopard frogs and green frogs, but usually die before the tadpoles metamorphose into froglets.
A situation in which hybrids are less successful (lower fitness) than individuals from either parent population will lead to which type of situation?
I. A population called the founder generation, consisting of 2000 AA individuals, 2000 Aa individuals, and6000 aa individuals is established on a remote island.Mating within this population occurs at random, thethree genotypes are selectively neutral, and mutationsoccur at a negligible rate.a. What are the frequencies of alleles A and a in thefounder generation?b. Is the founder generation at Hardy-Weinbergequilibrium?c. What is the frequency of the A allele in the secondgeneration (that is, the generation subsequent to thefounder generation)?d. What are the frequencies for the AA, Aa, and aagenotypes in the second generation?e. Is the second generation at Hardy-Weinbergequilibrium?f. What are the frequencies for the AA, Aa, and aagenotypes in the third generation?
7) A mule illustrates the effect of which type of isolation mechanism? a.Mechanical isolation. b.Temporal isolation. c.Hybrid inviability. d.Hybrid sterility.
A new species of snail was discovered. Your initial population genetics survey found that fA:0.48. To determine the primary mode of reproduction you survey the population again in one generation. You collect 100 individuals in the next generation. The composition of your collection is AA=38, Aa=20, aa=42. What is the primary mode of reproduction? a. random mating b. not enough information to determine c. nonrandom mating due to inbreeding
Two species of beetle are physically unable to mate with one another, despite being otherwise morphologically identical, because of the different structure of their reproductive organs. What type of isolating mechanism is involved? Group of answer choices A. behavioral isolation B. gametic isolation C. mechanical isolation D. temporal isolation E. habitat isolation
A population of birds may have red feathers Show work here: (the dominant phenotype) or orange feathers (the recessive phenotype). Red feathered birds have the genotype RR or Rr. Orange feathered birds have the genotype r. The fequency of the RR genotype is 46. a. What is the frequency of heterozygous birds? b. What is the frequency of the R allele? c. What is the frequency of the r allele?