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Q.
Choose the correct option regarding the number of genotypes in Mendelian dihybrid cross.
NTA AbhyasNTA Abhyas 2020
Solution:
Dihybrid cross is cross occuring between 2 genes having 2 distinct traits. Genotypic ratio of dihybrid cross can be calculated by punnet square. For a normal dihybrid cross genotypic ratio is 1:2:1:2:4:2:1:2:1. So genotype are 9. We can calculate it faster by using genotype number= 3^n where n= number of genes or traits involved.