father of modern genetics

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

A characteristic that an organism can pass on to its offspring through its genes.

An alternative (different) form of a gene.

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

Both alleles (factors) for a trait are the same and recessive (aa)

Both alleles (factors) for a trait are the same and dominant (AA)

two different alleles but still dominant (Aa)

XX

XY

number of chromosomes in a human sex cell

number of chromosomes in a human body cell

A condition in which both alleles for a gene are fully expressed ; neither is recessive (red + white = red & white)

A pattern of inheritance in which two alleles, inherited from the parents, are neither dominant nor recessive. (red + white = pink)

a relationship in which one allele is completely dominant over another (red + white = red)