Question

Which of the characters in the pair's- yellow/ green seed colour and round/wrinkled seed shape is dominant in case of Pisum sativum?

Answer 1

Part 1: Different contrasting characters in Pea plant
Mendel observed 7 contrasting characters in Pea plant (Pisum sativum).

$\begin{array}{cccc}\text{S.No.}& \text{Character}& \text{Dominant trait}& \text{Recessive trait}\\ \text{1}& \text{Stem height}& \text{Tall}& \text{Dwarf}\\ \text{2}& \text{Seed shape}& \text{Round}& \text{Wrinkled}\\ \text{3}& \text{Seed color}& \text{Yellow}& \text{Green}\\ \text{4}& \text{Flower colour}& \text{Violet}& \text{White}\\ \text{5}& \text{Pod color}& \text{Green}& \text{Yellow}\\ \text{6}& \text{Pod shape}& \text{Inflated}& \text{Constricted}\\ \text{7}& \text{Flower position}& \text{Axial}& \text{Terminal}\end{array}$

Part 2: Dominant characters
Dominant characters are the ones expressed even if only one copy of the allele is present. Among yellow and green seed colour, round and wrinkled seed shape - Yellow seed colour and round seed shape are dominant traits.