DNA Connection & Cell Inheritance

What is a mutation?

• any change that is harmful to an organism

• any change in a gene or chromosome

• any change that is helpful to an organism

• any change in the phenotype of a cell.

Mutations that are ____________ improve an organism's chances for survival and reproduction.

• helpful

• neutral

• harmful

A mutation in a BODY cell can be passed to offspring.

• True

• False

A mutation is harmful to an organism if it

• changes the DNA of the organism

• changes the phenotype of the organism.

• reduced the organism's chances for survival and reproduction.

• mades the organism better able to avoid predators.

All mutations are harmful.

• True

• False

The substitution of one base for another during DNA replication is an example of

• mutation

• meiosis

• homozygous

• heterozygous

Albino deer in the wild

• helpful

• harmful

• neutral

Chromosomes are made up of

• one pair of alleles

• many traits joined together

• transfer RNA

• many genes joined together

An organism can be heterozygous for some traits and homozygous for others

• True

• False

The chromosomes in a pair may have different ________________ for each gene.

• alleles

• mutations

• amino acids

• bases