JAMB - Biology (1982 - No. 9)
If a tall man (TT) marries a dwarf woman (gg) and they have four male children, the offspring will be?
All short
Three short and one tall
Two short and two tall
One short and three tall
All tall
解释
In complete dominance, the dominant allele(TT) completely covers up the recessive one(gg). The recessive allele isn't expressed at all in their physical appearance.