Answer:
Yy
Explanation:
We are given that n pea plants,
Yellow (Y) seed color is dominant color and green seed color (y) is a recessive trait.
Dominant trait:The allele which shows their effect in a pair of allele .The trait shown by allele is called dominant allele.
Recessive trait.The allele which does not show their effect in a pair of allele.Then,the trait not shown by allele in a pair of allele is called recessive trait.
When a plant with yellow seed(Yy) it mean yellow color is dominant color and green is recessive in plant cross with self then the plant can produce yellow seed and green seed plants in next generation.
It we take YY then there is no allele for green color so the plant can not produce green seed plant in next generation.
yy can not take because we are given that we have taken yellow seed plant but yy is green seed plant.
Yg can not take because we are given allele y for green color not g.