Biology Genetics & Evolution

Question 1

What is the basic unit of heredity?

Accepted Answer

Genes

Answer

Chromosomes.

Answer

Proteins.

Answer

Nucleotides.

Question 2

What is natural selection?

Accepted Answer

The process where advantageous traits become more common

Answer

Random changes in DNA.

Answer

Artificial breeding by humans.

Answer

Sudden environmental changes.

Question 3

What is a mutation?

Accepted Answer

A change in DNA sequence

Answer

A change in behavior.

Answer

A new species formation.

Answer

An environmental shift.

Question 4

What does genetic drift refer to?

Accepted Answer

Random changes in allele frequency

Answer

Directed changes in traits.

Answer

Natural selection.

Answer

Gene flow between populations.

Question 5

What is the role of DNA in heredity?

Accepted Answer

It stores genetic instructions for inheritance

Answer

It provides energy to the cell.

Answer

It forms the cell membrane.

Answer

It helps break down nutrients.

Question 6

What is speciation?

Accepted Answer

The formation of new species

Answer

The extinction of a species.

Answer

A mutation in a single organism.

Answer

Migration of individuals.

Question 7

How are traits inherited?

Accepted Answer

Through the transfer of genes from parents

Answer

Through learned behavior.

Answer

By environmental factors only.

Answer

By random chance.

Question 8

What is the purpose of a Punnett square?

Accepted Answer

To predict genetic trait probabilities

Answer

To display evolutionary relationships.

Answer

To map chromosomes.

Answer

To measure genetic drift.

Question 9

What is an adaptation?

Accepted Answer

A beneficial trait increasing survival and reproduction

Answer

A random mutation with no effect.

Answer

A learned behavior.

Answer

A sudden environmental change.