Question

if we cross tall pea plant with short pea plants .wxlain the inheritance patterms of f1 amd f2 generation. with the help of a cross following the laws of inheritance. state the visible character of f1 and f2 generation progencies .write the phenotypic and genotypic ratios of f2 generation ​

Answer 1

Explanation:

The allele for tall plant- T

The allele for short plant- t

genotype of tall plant- TT or Tt

genotype of short plant- tt

If genotype of tall plant is TT

short plant- tt

Then cross will be TT X tt

                           T          T

                     t    Tt        Tt

                     t    Tt        Tt

Then all progenies in F1 are tall plants with genotype-Tt

Now cross made between Tt  x Tt

                        T      t

             T       TT     Tt

             t        Tt        tt

In F2 the

phenotypic ratio is 3:1 (Tall: short)

and genotypic ratio is 1:2:1 (TT: Tt: tt)