Question

Which statement best describes how selective breeding affects the genetic makeup of purebred dog populations?

A) Desirable characteristics, such as soft fur, become more common in purebred dogs, so genetic diversity increases.

B)All harmful traits are eliminated from purebred dog breeds, so genetic diversity decreases.

C)Purebred dog breeds have higher rates of genetic mutation than mixed breeds, so genetic diversity increases.

D)Dogs exhibiting desirable characteristics are bred only with one another, so genetic diversity decreases.

Answer 1

The statement which best describes how selective breeding affects the genetic makeup of purebred dog populations is D)Dogs exhibiting desirable characteristics are bred only with one another, so genetic diversity decreases.

How does selective breeding decrease the genetic diversity?

• As a result of selective breeding, those organisms which have favorable traits are bred and hence these characteristics are passed to the offspring.
• All the other organisms with not so desirable traits will be at the verge of extinction.
• As a result, the genetic diversity will decrease.

Answer 2

The correct answer is option (D) Dogs exhibiting desirable characteristics are bred only with one another, so genetic diversity decreases.

Explanation:

• The statement which best describes how selective breeding affects the genetic makeup of purebred dog populations is that the Dogs exhibiting desirable characteristics are bred only with one another, so genetic diversity decreases.
• As the result of the selective breeding, those organisms which have favorable traits are breed and hence these characteristics are passed on to their offspring.
• All the other organisms with not so desirable traits will be at the verge of extinction.
• As concluded, the genetic diversity will decrease.