Answer: The correct answer is B) 25%.
According to Mendel's law of dominance, in a cross between parents that are true breeding for a contrasting trait (like plant with red flower and white flower), only one form is expressed in the next generation and that form is called dominant trait.
As per the Mendelian inheritance, red flower color ( R) is dominant over white flower color (r), which is recessive. White flower will be produced with the genotype 'rr' only.
According to the punnett square, when parents that are heterozygous for red flower ( Rr and Rr) are crossed, they will produce 25% of the offsprings with white flower ( rr).
