Principle of Inheritance and VariationMediumBloom L2
Question
Which one of the following cannot be explained on the basis of Mendel's Law of Dominance?
Options
A.The discrete unit controlling a particular character is called a factor
B.Out of one pair of factors one is dominant, and the other recessive
C.Alleles do not show any blending and both the characters recover as such in F2 generation.
D.Factors occur in pairs
Solution
Sol.(c) [Key Concept: Mendel's Law of Dominance — Limitations] Option (c) — 'Alleles do not show blending and both characters recover in F2' — CANNOT be explained by the Law of Dominance. It is explained by the Law of INDEPENDENT ASSORTMENT/SEGREGATION. The Law of Dominance explains: (a) discrete factors/genes exist; (b) one factor is dominant and the other recessive; (d) factors occur in pairs. The reappearance of recessive characters in F2 (without blending) is explained by segregation and independent assortment.
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