Q135
General ScienceBiology
In monohybrid cross of Mendel, when a pure tall plant was crossed with a dwarf plant, all the F1 progeny were tall, because of:
- a.Co-dominance
- b.Dominance
- c.Incomplete dominance
- d.Epistasis
Answer: (B) Dominance
In Mendel's monohybrid cross, the tall allele (T) is dominant over the dwarf allele (t). When TT × tt are crossed, all F1 offspring are Tt (heterozygous) but appear tall because the T allele dominates and suppresses expression of t. This is the principle of Dominance, Mendel's first law.