In Mendel’s experiments, tall pea plants (T) are dominant over dwarf pea plants (t).
State Mendel’s Law of Dominance.
Topic: Law of Dominance
Answer
MENDEL’S LAW OF DOMINANCE states that when two contrasting alleles of a character are present together in an organism, only ONE — the DOMINANT allele — expresses itself in the F1 generation, while the other, the RECESSIVE allele, remains hidden or masked.
The essential words are that the recessive allele is MASKED, not destroyed. It is carried on unchanged and reappears in the F2 generation.
THE EVIDENCE is in parts (i) and (iii) of this very question: dwarfness vanishes completely in F1 and returns in a quarter of F2. If the alleles had blended, it would have been lost for ever.
Mendel’s three laws as a set: DOMINANCE — only the dominant character shows in a hybrid SEGREGATION — the two alleles of a pair separate during gamete formation, each gamete receiving only one INDEPENDENT ASSORTMENT — different pairs of alleles are inherited independently of one another