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

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Solution

(a) 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.

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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

(a) 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.

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

(a) 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.