BIOL 1407 V.2 PKG >2014<
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ISBN: 9781269751919
Author: Campbell
Publisher: Pearson Custom Publishing
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Chapter 24.2, Problem 2CC
Summary Introduction
To describe: Two mechanisms in sympatric populations which decrease the gene flow and making sympatric population most likely to occur.
Concept introduction:
In “sympatric
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Explain the difference in behaviors of temporally isolated species when it comes to Allopatric vs Sympatric speciation.
Decide whether each of the following scenarios would lead to prezygotic or postzygotic reproductive
isolation:
a) Dragonflies from two different populations have genitals that do not match, so they can't mate
successfully [Select ]
b) Two different species of fish have very different courtship displays, but they can mate and produce a
non-fertile offspring [Select]
c) One species of plant flowers in the winter, while another flowers in early spring
[ Select ]
d) The gametes of two tree species can fuse, but a zygote does not form
[ Select ]
e) A mountain range separates two populations of snakes
I Select]
ADJUST
Negative assortative mating means that organisms choose mates that are different
from themselves. If negative assortive mating occurs in a population, what would
expect to happen to genotype frequency over generations?
O a) Frequency of the heterozygous genotype will increase.
b) Frequency of the homozygous genotypes will decrease.
O c) Frequency of the homozygous genotypes will increase.
O d) Both A and B
AUTO
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Chapter 24 Solutions
BIOL 1407 V.2 PKG >2014<
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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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
- Negative assortative mating means that organisms choose mates that are different from themselves. If negative assortive mating occurs in a population, what would expect to happen to genotype frequency over generations? a) Frequency of the heterozygous genotype will increase. b) Frequency of the homozygous genotypes will decrease. c) Frequency of the homozygous genotypes will increase. O d) Both A and Barrow_forwardWhich of the following statements about sympatric speciation is correct? It is a process through which two populations can diverge and develop reproductive isolation while in two different geographic area. It is the most common mechanism for populations to form independent species. Postzygotic isolation is the main form of reproductive isolation for the sympatric speciation process. Genetic isolation through large scale chromosomal mutations, such as chromosome inversion or polyploidy, are more likely contributing to sympatric speciation. None of the abovearrow_forwardIn a real habitat, new squirrels often come into the habitat (immigrate) and others leave the area (emigrate). How might emigration of squirrels with gray fur from this population affect the gene frequency of G and g in this population of squirrels? How might immigration of leucistic squirrels into this population affect the gene frequency of G and g in this population of squirrels? How might you simulate the effect of each of these scenarios if you were to repeat this simulation activity?arrow_forward
- The primary mechanism of sympatric speciation is a)dispersal and colonization of new environments b)arrow_forwardIf (positive) assortative mating increases in a population, what would expect to happen to genotype frequency over generations? O a) Frequency of the heterozygous genotype will increase. b) Frequency of the homozygous genotypes will decrease. O c) Frequency of the homozygous genotypes will increase. O d) There will be no change in genotype frequency.arrow_forwardExplain why parapatric speciation is more likely to occur in sedentary organismsarrow_forward
- true or false, Sexual selection may lead to sympatric speciationarrow_forwardThrough the human introduction of invasive species and forced migration of various species such as pack mules, elk, and hog-nosed skunks into the Kaibab squirrels’ habitat, scientists hypothesize two outcomes that might occur to the squirrel population. Examine the following null hypotheses formulated to explain rates of speciation and extinction of the Kaibab squirrel population as an influx of species continues to migrate into their niche. Null Hypothesis: The rate of speciation (C) remains steady when species compete for available resources while all will continue toward extinction (B). Which of the following graphically depicts the alternative hypotheses?arrow_forwardWhat are the common mechanisms in Sympatric speciationarrow_forward
- Over time, enough genetic variations can develop within a population to cause it to undergo speciation. Identify the various mechanisms that will prevent different species from being able to reproduce successfully. Which of these mechanisms is the most influential in keeping species sperate?arrow_forwardThe approximately 600 species of cichlids in East Africa’s Lake Victoria have largely resulted from sympatric speciation. The closely related cichlids species P. pundamilia and P. nyererei are thought to have arisen by sexual selection. Mate choice by females strongly favors males of their own species that have different body colors. In recent years, pollution has caused the water of Lake Victoria to become turbid in some areas. Hybrids of P. pundamilia and P. nyererei were produced and the gene pools of the two species have started to fuse, creating a new hybrid species. In this process, what are the conditions that led to the fusion of P. pundamilia and P. nyererei? A. Only the prezygotic reproductive barrier is not complete for the two species. B. Only the postzygotic reproductive barrier is not complete for the two species. C. Both the prezygotic and the postzygotic reproductive barriers are complete for the two species. D. Both the prezygotic and the postzygotic reproductive…arrow_forwardWhat is the key difference between prezygotic and postzygotic isolating mechanisms? Give an example of each type. Which type is more costly from the perspective of energy?arrow_forward
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