Which of the following is a good description of Sympatric speciation? A. Speciation without geographic isolation B. Changes in sequence of DNA of an organism C. Speciation due to geographical isolation D. The change in the genetic characteristics of a population of organisms over time

Which of the following is a good description of Sympatric speciation? A. Speciation without geographic isolation B. Changes in sequence of DNA of an organism C. Speciation due to geographical isolation D. The change in the genetic characteristics of a population of organisms over time

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 4TYU: The first step leading to allopatric speciation is (a) hybrid inviability (b) hybrid breakdown (c)...

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Concept explainers

Evolutionary lineages

An evolutionary lineage is a series of populations of organisms that descend from a common ancestor. Each species in the lineage is the direct consequence of evolutionary change from a common ancestor. A phylogenetic tree is generally used to display lineages visually. Lineages are components of the phylogenetic tree of life. Molecular systematics procedures are widely used to predict lineages.

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Definition Definition Process by which new species arise. This occurs when populations of a species become isolated and diverge, developing unique traits through natural selection, genetic drift, or other mechanisms. Over time, these differences accumulate until the populations can no longer interbreed and are considered separate species.

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While donkeys and horses have ignored each other historically in the wild, hybrids can be made through artificial insemination. The resulting hybrids are unusual in that they are generally viable, but always sterile. Because of their sterility, a blended lineage of the two animals cannot exist. What evolutionary force is this an example of? A. Prezygotic barrierB. Postzygotic barrierC. Allopatric SpeciationD. Sympatric Speciation
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If gene flow between two populations stops, which of the following could occur given enough time? a. speciation b. the population each gain unique alleles c. the timing of reproduction changes ending their ability to interbreed d. frequencies of alleles shift in different ways e. these are all things that could occur if gene flow between two populations of one species ended, given enough time
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please help with these two questions: 1. An earthquake and tsunami, Richter scale of 7, destroyed a small village near the epicenter in Indonesia. Families were separated, food became scarce and the land was too damaged for traveling between now divided landmasses. This situation prevails for an extended time period. Which of these speciation models more than likely will occur under these conditions? a. Sympatric b. Allopatric c. Peripatric d. Parapatric e. None of the above 2. The Hardy–Weinberg theorem is an important mathematical proof because a. It demonstrates that dominant alleles are more common than recessive alleles. b. It demonstrates evolution. c. It demonstrates that a locus can have only one of two alleles. d. It demonstrates that in the absence of outside forces, allele frequencies of a population will not change from one generation to the next. e. It demonstrates that heterozygotes are always better.
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