THE MONOHYBRID CROSS THE DIHYBRID CROSS GENETIC CROSSES THE MONOHYBRID CROSS THE DIHYBRID CROSS

First: Set up the Parental Cross P 1 A = axial flowers Male a = terminal flowers Female AA X aa

SET UP THE PUNNETT SQUARE

Put the Alleles in Separate Boxes

A Monohybrid Cross

Now Perform an F1 Cross A = axial flowers Male a = terminal flowers Female F1 = First Offspring Aa X Aa

Put the Alleles in Separate Boxes

Perform the Cross

Assess The Genotype and Phenotypes GENOTYPES AA 1 Aa 2 aa 1 Ratio 1:2:1 PHENOTYPES Axial Flowers (AA, Aa) 3 Terminal Flowers (aa) 1 Ratio 3:1

Assess The Genotype and Phenotypes Axial Flowers 3 Terminal Flowers 1 Ratio 3:1 GENOTYPES AA 1 Aa 2 aa 1 Ratio 1:2:1

First: Set up the Parental Cross P 1 . F =flying f = walking P = purple p = orange FFPP X ffpp MALE FEMALE

PARENTAL P1 DIHYBRID CROSS

PARENTAL P1 DIHYBRID CROSS

. F =flying f = walking P = purple p = orange Do the F1 cross FfPp X FfPp Be sure you choose one of EACH type of allele

F2 DIHYBRID CROSS

F2 DIHYBRID CROSS

F2 DIHYBRID CROSS

F2 DIHYBRID CROSS

F2 DIHYBRID CROSS

F2 DIHYBRID CROSS

F2 DIHYBRID CROSS