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In a species of fish, two neighboring populations occupy slightly different habitats; the first mainly lives in shallow waters with low predation, the second lives in deeper waters with increased predation. Males in the first population develop a long anal fin as secondary sexual trait in population, but males in the second population do not have long fins. When researchers artificially attached long anal fins to males from the second population, they found that female fish much preferred males with the longer fins. They also found that gene flow between these populations exist, and that long anal fins make it harder to swim fast. Why aren't long fins more frequent in this population? Natural selection is counteracting sexual selection O There isn't enough genetic variation for long tails to develop These populations are in the process of speciating, and eventually females will develop a preference for short tails. O Drift is causing long tails to disappear from the population

In a species of fish, two neighboring populations occupy slightly different habitats; the first mainly lives in shallow waters with low predation, the second lives in deeper waters with increased predation. Males in the first population develop a long anal fin as secondary sexual trait in population, but males in the second population do not have long fins. When researchers artificially attached long anal fins to males from the second population, they found that female fish much preferred males with the longer fins. They also found that gene flow between these populations exist, and that long anal fins make it harder to swim fast. Why aren't long fins more frequent in this population? Natural selection is counteracting sexual selection O There isn't enough genetic variation for long tails to develop These populations are in the process of speciating, and eventually females will develop a preference for short tails. O Drift is causing long tails to disappear from the population

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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No Service x 12:43 AM ✓ @ 53% In a species of fish, two neighboring populations occupy slightly different habitats; the first mainly lives in shallow waters with low predation, the second lives in deeper waters with increased predation. Males in the first population develop a long anal fin as secondary sexual trait in population, but males in the second population do not have long fins. When researchers artificially attached long anal fins to males from the second population, they found that female fish much preferred males with the longer fins. They also found that gene flow between these populations exist, and that long anal fins make it harder to swim fast. Why aren't long fins more frequent in this population? O Natural selection is counteracting sexual selection O There isn't enough genetic variation for long tails to develop O These populations are in the process of speciating, and eventually females will develop a preference for short tails. O Drift is causing long tails to disappear from the population
Transcribed Image Text:No Service x 12:43 AM ✓ @ 53% In a species of fish, two neighboring populations occupy slightly different habitats; the first mainly lives in shallow waters with low predation, the second lives in deeper waters with increased predation. Males in the first population develop a long anal fin as secondary sexual trait in population, but males in the second population do not have long fins. When researchers artificially attached long anal fins to males from the second population, they found that female fish much preferred males with the longer fins. They also found that gene flow between these populations exist, and that long anal fins make it harder to swim fast. Why aren't long fins more frequent in this population? O Natural selection is counteracting sexual selection O There isn't enough genetic variation for long tails to develop O These populations are in the process of speciating, and eventually females will develop a preference for short tails. O Drift is causing long tails to disappear from the population
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