Question

how many types of phenotypes would you expect in F2 generation in a monohybrid cross?​

Answer 1

both the genes express themselves equally in the heterozygous condition. Therefore, three different kinds of phenotypes would be seen in the F2 generation in a monohybrid cross. 

Example: Colour inheritance in snapdragon.

Red flower: RR; White flower: rr

F1 generation: RR * rr

                              ↓

                             Rr

F2 generation: Rr * Rr

                             ↓

                     RR Rr Rr rr

Three phenotypes are seen i.e. Red (RR), pink (Rr) and white (rr).

According to the law of dominance, the phenotype of Rr should be red since R is dominant over r. But Snapdragon does not follow Mendelian inheritance. R is not able to completely express itself over r. This results in a third phenotype (here, pink).

Therefore, three phenotypes are seen in F2 generation in a monohybrid cross.

Answer 2

Answer:

three phenotypes

Therefore, three phenotypes are seen in F2​ generation in a monohybrid cross.F2 generation, 3/4 showed the dominant phenotype, and 1/4 showed the recessive phenotype.