Question

List two differences in tabular form between dominant trait and recessive traits. What percentage/proportion of the plants in the F₂ generation/progeny were round, in Mendel's cross between round and wrinkled pea plants?

 

 

Answer 1

Difference between dominant trait and recessive gene/trait

Dominant Trait	Recessive Trait
It is a trait or characteristic, which is able to express itself over another contrasting trait.	It is a trait which is unable to express its effect in the presence of the dominant trait.
It can express in both heterozygous and homozygous conditions.	It can  express only in homozygous condition.

Cross between round (RR) and wrinkled (rr) pea plants
Parents                RR         ⨉         rr
Gametes               R                      r
F₁ progeny               Rr (round seed)
Selfing in F₂ generation

	R	r
R	RR	Rr
r	Rr	rr

Result: In F₂ generation, the progeny will be
75% round (RR, Rr)
25% wrinkled (rr)