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Applied Genetics

Question 3 • PT-GSE Environmental Science B-IC – 81

Why can inbreeding be potentially harmful to populations? Check all that apply.

Answer
A
Negative traits, such as diseases, may build up in the population.
B
Useful traits may be “bred out” of the population.
C
Genetic diversity of the population is increased.
D
The population becomes weaker and less resilient.

Explanation

Inbreeding makes closely related individuals more likely to pass the same inherited alleles to their offspring. This can increase the chance that harmful recessive traits appear and may reduce useful variation, making a population weaker and less resilient. It does not increase genetic diversity; it generally decreases it.

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