Genetics Vocabulary

Front

One of a number of different forms of the same gene that controls a specific trait.

Back

allele

Front

The breeding of two parents with different genes that produce offspring that have characteristics of both parents.

Back

cross

Front

A cross between two individuals for two traits.

Back

dihybrid cross

Front

Describes the number of times a genotype would appear in the offspring after a test cross.

Back

genotypic ratio

Front

An allele or a gene that is expressed in an organism's phenotype, masking the effect of the recessive allele or gene when present.

Back

dominant

Front

A cross between two individuals for one trait.

Back

monohybrid cross

Front

A gene that can be masked by a dominant gene

Back

recessive

Front

The unit of heredity made of nucleotides that is responsible for the physical and heritable characteristics or phenotype of an organism.

Back

gene

Front

Having 2 different alleles for a trait (1 dominant and 1 recessive).

Back

heterozygous

Front

Both alleles for a trait are the same

Back

homozygous