Genetic material that consists of sugar, phosphate, & nitrogenous bases adenine, guanine, thymine, cytosine

A specific form of a gene

Alleles are always represented by letters & they are always paired.

An example of a gene is _______, while an example of an allele is _______.

The alleles someone has for a particular gene

The physical appearance of a person or organism

A dominant allele is

A recessive allele is

Brown hair is an example of a

Aa is an example of a

You need ______ of the dominant allele (A) to show the dominant phenotype.

You need ______ of the recessive allele (a) to show the recessive phenotype.