Test cross involves

Percentage of recessive phenotype in a cross between $pp$ and $Pp$, when $P$ is dominant, $p$ recessive

A tall true breeding garden pea plant is crossed with a dwarf true breeding garden pea plant. When the $F_1$ plants were selfed the resultinggenotypes were in the ratio of

For the expression of traits genes provide only the potentiality and the environment provides the opportunity. Comment on the veracity of the statement.

Change in single base pair