Which of the following reunites the exon segments after RNA splicing ?

There are three genes a, b and c. The percentage of crossing over between a and b is 20%, b and c is 28% and a and c is 8%. What is the sequence of genes on chromosome

On selfing a plant of F₁ generation with genotype “AABbCC”,the genotypic ratio in F₂ generation will be

A gene said to be dominant if : -