Question

find the phenotype ratio when a heterozygous tall plant with violet flower is crossed with drawf plant with white flowers.
Please show with the help of punnet square

Answer 1

it's a Mendel's dihybrid experiment where two characters are considering at one time.

here we have tall plant with violet flowers and short plant with white flowers.

TALL character denoted by T

short character as t

PURPLE character as P

white character as p

1) TTPP. cross ttpp

Result TtPp. (F1 generation)

then self pollination of F1 generation

phenotypic ratio will be 9:3:3:1.

the 9 represents the proportion of individuals displaying both dominant traits

the first 3 represents the individuals displaying the first dominant trait and the second recessive trait

the second 3 represents those displaying the first recessive trait and second dominant trait

the 1 represents the homozygous, displaying both recessive traits.

hope you understand