Question

Which one of the following cannot be explained on the basis of Mendel’s Law of Dominance?

विकल्प

• The discrete unit controlling a particular character is called a factor.

• Out of one pair of factors one is dominant, and the other is recessive.

• Alleles do not show any blending and both the characters recover as such in F₂ generation

• Factors occur in pairs

Answer 1

Alleles do not show any blending and both the characters recover as such in F₂ generation

Explantion:

According to the law of dominance, third option cannot be justified. The only theory that can account for it is Mendel's law of independent assortment, which states that in a dihybrid cross, the two alleles of each character assort independently (do not show any blending) of the alleles of other characters and separate at the time of gamete production. Both characters have returned in their original forms. Both new and ancestor-based alt combinations are produced in the F₂ generation.