PATHOLOGY

Detailed explanation-1: -Completely linked genes do not show crossover and independent assortment, thereby produce only parental combinations; option D is the correct answer.

Detailed explanation-2: -However, recessive traits reappeared in the second generation (F2). Each individual carries a pair of factors for each trait, and they separate from each other during fertilisation. This is the basis of Mendel’s principle of segregation.

Detailed explanation-3: -The Gregor Mendel pea plant experiment was conducted between 1856 and 1863. Mendel selected several specific pea traits and performed cross-pollination or artificial pollination in pea lines with stable trait inheritance that were continuously self-pollinating.

Detailed explanation-4: -The number of genotypes in F2 generation is given by the formula N2 where ‘N’ represents the number of genes. Here, N=4 hence going by the formula we get the number of genotypes as 16. So, the correct option is ‘16’.