Genetics - Isabella Galante

Allele

different forms of a single gene (example: genes for eyes can be for brown eyes OR blue eyes)

Genotype

the inherited combination of alleles

Phenotype

an organism’s inherited appearance.

Dominant

Recessive

a trait that appears only when two recessive alleles for the same characteristic are inherite

Homozygous dominant (pure dominant)

TT (2 dominant alleles)

Heterozygous (hybrid)

Tt (1 dominant and 1 recessive allele)

Homozygous recessive (pure recessive)

tt (2 recessive alleles)

Pedigree

A family history that traces the inheritance of a particular trait

Gene

segment of DNA that carries hereditary information and is passed down from parent to offspring

Chromosome

a tiny instruction book inside your cells. It tells your body how to grow, look, and work. You get half of your chromosomes from your mom and half from your dad.