Factors are defined as....

Which of the following pea plants will always produce white flowers?

To determine the genotype of an offspring,which cross should be performed?

Which of the following terms represents a pair of contrasting characters?

$A$ disease is caused by a dominant gene,but it shows only $20\%$ penetrance. $A$ heterozygous man marries a homozygous normal woman. What proportion of the children in the population is expected to have the disease?

Select the incorrect statement regarding Gregor Mendel.