Genetics Essential Vocabulary

Front

Kinds of genes or alleles for a trait (usually represented by letters)

Back

genotype

Front

The observable expression of a trait (physical appearance like brown eyes, freckles or tall plant)

Back

phenotype

Front

An alternate form of a gene for a particular trait (one from mom and one from dad)

Back

allele

Front

Two different alleles for the same trait -Tt

Back

heterozygous

Front

Two identical alleles for the same trait - tt, RR, gg

Back

homozygous

Front

An inherited trait that is present and observed even when inherited only from one parent - expressed as a capital letter.

Back

dominant

Front

The form of the gene that shows up only when inherited from both parents – expressed as a lower case letter

Back

recessive

Front

Tt, Mm, Dd, Rr are all examples of

Back

heterozygous

Front

The passing of traits from parents to offspring is known as

Back

heredity

Front

A punnett square that shows a cross with only ONE trait

Back

monohybrid cross