Q. 29

(a) Write the F<s

Answer :

(a) Phenotypic ratio of Mendelian dihybrid cross is-


Law of independent assortment explains the dihybrid phenotypic ratio. It states-

When two pairs of alleles are present together in a hybrid, the segregation of one pair of the allele is independent of the other pair.

(b) Difference between pleiotropic and polygenic inheritance are-


(a) The components of a nucleoside are- Nitrogenous base (Adenine, Guanine, Thymine, and Cytosine) and pentose sugar.

When a phosphate group is added to the 5’ –OH position of the nucleoside through phosphoester linkage, a nucleoside becomes the corresponding nucleotide which polymerizes to form a DNA polynucleotide.

(b) The complementary base pairing is that, Adenine is bonded to Thymine with the help of two H-bonds. Whereas, Guanine is bonded to Cytosine with the help of 3 H-bonds.

(c) It refers to the fact that the 5’ carbon of the sugar is attached to a phosphate group and the 3’ carbon of the sugar is attached to the hydroxyl group.

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