Punnet Square Flashcards

Punnet Square

A chart that shows all the possible combinations of alleles that can result from a genetic cross

Genotype

Genetic makeup for a organism

Phenotype

A organism physical appearance/visible traits

Trait

A determined characteristic (eye color, Hair color)

Allele

A version of a gene that is represented by a letter

Gene

A segment of DNA on a chromosome that codes for a specific trait

Genetics

Study of heredity

Heterozygous

An organism with two different alleles for a gene.

Heterozygous

A organism that has two different alleles for a gene

Homozygous

A organism that has two identical alleles for a trait

Dominant

A allele that is represented with a capital letter

Recessive trait

A allele that is represented with a lowercase letter

BB

A homozygous dominate genotype

Bb

heterozygous genotype

bb

Homozygous recessive genotype

Genotype Ratio

The expected numbers of different allele combinations (letters) produced by a particular cross.

Phenotype Ratio

The expected numbers of different physical traits produced by a particular cross.