Punnet sqaure

Homozygous

An organism that has two identical alleles for a trait

Genes

Chemical factors that determine traits

Allele

Different forms of a gene

Genetics

The scientific study of heredity

Dominate trait

a genetic factor that blocks another genetic factor

recessive trait

a genetic factor that is blocked by the presence of a dominant factor

Punnett Square

diagram showing the gene combinations that might result from a genetic cross

Genotype

genetic makeup

Heterozygous

having two different alleles for a trait

Probability

likelihood that a particular event will occur

Phenotype

physical characteristics of an organism

Trait

specific characteristic of an individual