Gregor Mendel and Hereditary Definitions

P

Parental generation

F1 (Filial 1)

The first offspring from a cross mating of distinctly different parents

F2 (Filial 2)

The offspring from self-fertilising or intercrossing F1

Mendel’s Law of Segregation

The original alleles in the parent cells are split into different gametes

Mendel’s Law of Independent Assortment

Alleles of one gene segregate into gametes independently of the alleles belonging to other gene pairs, resulting in the production of gametes containing all possible combinations of alleles

Incomplete Dominance

The expression of a phenotype that is immediate to those of the two parents where the two alleles are blended in the offspring (brown and white horse make a beige horse)

Multiple Alleles

When there are more than one allele for each gene

Co-dominance

Two alleles are simultaneously expressed in the heterozygote, the trait is neither dominant or recessive (brown and white horse make a splotchy brown and white horse)