Intro to Genetics

The study of heredity

Genetics

Dominant trait is a version of trait that expresses itself over another

Law of Dominance

Traits that express themselves over recessive traits

Dominant traits

Trait that can be 'hidden' by dominant traits

Recessive trait

Organism's genetic makeup (the genes, aka LETTERS)

Genotype

What the organism looks like (appearance)

Phenotype

Having identical alleles for a trait (purebred)

Homozygous

Having different alleles for a trait (hybrid)

Heterozygous

A method to predict the genotype of offspring by writing one parent genotype across the top and one on the left

Punnett Squares

Round = letter is R

Dominant trait

Example of heterozygous

Tt

Example of homozygous

tt TT

alternative forms of a gene inherited by each parent

allele

resulting in a blended phenotype.

incomplete dominance

resulting in both traits being shown

codominance