Question

In peas, spherical seed shape (S) is dominant over dented, and yellow colour (Y) is dominant over green, and these traits are not linked. If plants heterozygous for both traits (SsYy) are crossed , by means of a Punnet square, work out the phenotypes and phenotypic ratios obtained? *

Answer 1

Answer:

Turns out they have yellow peas because the yellow version, Y, is dominant over the recessive green version, y. Y always wins out over y: When a pea plant makes seeds, only one of its two copies of the color gene goes into the seed. So if you have two green pea plants, each can only pass a green version.