question_answer 3)

Explain Law of Dominance using a monohybrid cross. 

Answer:

Law of dominance states that when a pair of alleles or allelomorphs are brought together in F1 hybrid, then only one of them expresses itself, masking the expression of other completely. Monohybrid cross was made to study simultaneous inheritance of a single pair of Mendelian factors. The cross in which only alternate forms of a single character are taken into consideration is called monohybrid cross. The trait which appeared in the F1 generation was called dominant and the other which did not appear in the F1 population was called recessive.                 Thus, when a pair of alleles are brought together in F1 hybrid, then only one of them expresses itself masking the expression of other completely. In the above example, in Tt ? F1 hybrid (tall) only ?T? expresses itself so dominant and 'f is masked so recessive. Thus, this proves and explains the law of dominance.