Question

A cross between a tall plant (TT) and short plant (tt) resulted in progeny that were all tall plants because :
(a) tallness is the dominant trait
(b) shortness is the dominant trait
(c) tallness is the recessive trait
(d) height of plant is not governed by gene T or t

Answer 1

 tallness is the dominant trait
 In progeny, all plants obtained will be tall because tallness is the dominant trait, while dwarfism is the recessive trait.