Question

Given below is a schematic diagram showing Mendel’* Experiment on sweet pea plants having axial flowers with round seeds (AARR) and Terminal flowers with wrinkled seeds (aarr). Study the same and answer the questions that follow :

(i) Give the phenotype of F1 progeny.

(ii) Give the phenotypes of F2 progeny produced upon by the self-pollination of F1 progeny.

(iii) Give the phenotypic ratio of F2 progeny.

(iv) Name and explain the law induced by Mendel on the basis of the above observation.

Answer 1

(i) Axial round

(ii) Axial round, axial wrinkled, terminal round, terminal wrinkled.

(iii) 9:3:3:1

(iv) Law of independent assortment: When there are two pairs of contrasting characters, the distribution of factors of each pair in the gametes is independent of the distribution of other pair of characters.