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Genetic Drift and Population Size

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Questions and Answers

What is the result of an error in DNA replication?

Genetic drift

Natural selection

Mutation (correct)

Gene ow

What is the probability of a point mutation in higher plants and animals?

1 in a billion (10–9) (correct)

1 in a trillion

1 in 1000

1 in 10

What is the term for a change in a single nucleotide?

Gene duplication

Point mutation (correct)

Natural selection

Genetic drift

What can occur when whole chromosomes are duplicated?

Down’s syndrome (B) Signup and view all the answers

What is the risk of trisomy 21 in the US population?

Between 1/650 and 1/1000 (C) Signup and view all the answers

What can be created when a duplication occurs in a gene?

A second copy of a gene (D) Signup and view all the answers

What is an example of a triploid organism?

Banana (C) Signup and view all the answers

What can occur if there is no reduction division during meiosis?

Diploid gametes (D) Signup and view all the answers

What is the term for whole genomes being duplicated?

Polyploid (A) Signup and view all the answers

What increases the risk of trisomy 21?

Maternal age (B) Signup and view all the answers