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Chapter 19: Q.21 (page 484)

Explain what a cline is and provide examples.

Short Answer

Expert verified

A cline is a progressive change in the character of a specific species in a population that is connected with a geographic transition.

Example- warm-blooded animals.

Step by step solution

01

Introduction

A cline is a geographic gradient or average character value that gradually increases geographic variance by a gene's frequency.

02

 Explanation

Geographic variation arises in populations of a particular species and spreads across an ecological gradient known as a cline. Warm-blooded animals, for example, have bigger bodies in cooler climes near the earth's poles, allowing them to preserve heat more effectively. This is known as a latitudinal cline. In addition, blooming plants bloom at different times on the incline of the mountain, which represents the altitudinal cline.

03

Conclusion

As a result, a cline is a progressive change in the character of a specific species in a population that is connected with a geographic transition.

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Most popular questions from this chapter

When males and females of a population look or act differently, it is referred to as ________.

a. sexual dimorphism

b. sexual selection

c. diversifying selection

d. a cline

One of the original Amish colonies rose from a ship of colonists that came from Europe. The ship’s captain, who had polydactyly, a rare dominant trait, was one of the original colonists. Today, we see a much higher frequency of polydactyly in the Amish population. This is an example of:

a. natural selection

b. genetic drift

c. founder effect

d. b and c

Which type of selection results in greater genetic variance in a population?

a. stabilizing selection

b. directional selection

c. diversifying selection

d. positive frequency-dependent selection

When male lions reach sexual maturity, they leave their group in search of a new pride. This can alter the allele frequencies of the population through which of the following mechanisms?

a. natural selection

b. genetic drift

c. gene flow

d. random mating

Explain the Hardy-Weinberg principle of equilibrium theory.
See all solutions

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