MONOHYBRID AND DIHYBRID CROSSES PUNNETT SQUARE
*Punnet square:
→Punnet square is a graphical method that shows all the possible combinations of different types genotypes
in crosses.
**Monohybrid cross punnett square:
Genotypes ratio: 1 : 2 : 1
Phenotypes ratio: 3 : 1
→First, write all the possible combinations of different types of gametes on the punnett square.
→Then, cross the gametes on the punnett square.
**Dihybrid crosses punnett square:
AaBb x AaBb
→First, write all the possible combinations of different types of gametes on the punnett square.
→Then, cross the gametes on the punnett square.
Phenotypes ratio: 9 : 3 : 3 : 1
9 AB phenotype
3 Ab phenotype
3 aB phenotype
1 ab phenotype
###########################################################################################
