7th Grade Science Checkpoint 4 Review

Organisms that carry identical alleles for a trait

• hybrid

• purebred

• heterozygous

A sudden, unexpected change in a gene

• mutagen

• mutation

• transcription

• translation

Where are chromosomes found?

What is responsible for transmitting nerve impulses?

• sensory receptors

• nerve cells

• spinal cord

• cerebellum

Unit of heredity which determines the traits of an offspring

• DNA

• amino acid

• nucleus

• gene

Where would you find DNA molecules?

• In all living organisms

• In animals only

• In plants only

• In living and nonliving things

Mutations are changes to a gene that result in a different protein being made

• True

• False

Does a dog contain DNA?

• Yes

• No

The genetic make-up of an organism

• phenotype

• genotype

• heterozygous

• homozygous

Unexpected changes that occur in a sequence of DNA

• mutation

• protein

• amino acid

• nitrogen base