Genetics Basics Quiz 2026

An observable characteristic

• trait

• gene

• allele

• DNA

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A portion of a gene, information from one parent

• trait

• gene

• allele

• DNA

Tags

NGSS.HS-LS3-1

NGSS.HS-LS1-1

The alleles that an organism has, represented by letters

• genotype

• phenotype

• chromosome

• recessive

Tags

NGSS.HS-LS3-1

When an organism has two of the same alleles (sometimes called a purebred), it is called

• homozygous

• heterozygous

• recessive

• dominant

When an organism has two different alleles, it is called

• homozygous

• heterozygous

• recessive

• dominant

This type of allele is expressed whether there are one or two copies present.

• dominant

• recessive

• homozygous

• heterozygous

Tags

NGSS.HS-LS3-1

These types of alleles are only expressed if the organism has two copies

• dominant

• recessive

• homozygous

• heterozygous

The genotype Aa is best described as

• heterozygous

• homozygous

The genotype gg is best described as

• heterozygous

• homozygous

In pea plants, purple flowers (P) are dominant to white flowers (p). The phenotype of a PP plant would be

• purple

• white

• homozygous

• heterozygous

Tags

NGSS.HS-LS3-1