Question

how phenotypic ratio of dihybrid cross can modify ​

Answer 1

9:3:3:1

Earlier, Mendelian dihybrid ratios obtained by crossing of dihybrid genotypes resulted in a phenotypic ratio of 9:3:3:1. This ratio is considered when the alleles of both loci display either dominant or recessive relationships. When the loci have co-dominant alleles or lethal alleles this classical ratio gets modified.

Answer 2

by crossing F1 PROGENY

WITH PARENTS