Pure Yellow Seeded Plant Crossed with Green Seeded Plant

Is this an example of monohybrid or dihybrid cross ?

Final answer:

The cross between a pure yellow seeded plant and a green seeded plant is a monohybrid cross, involving only one trait - seed color. In this cross, all F1 offspring will have yellow seeds due to the dominance of the yellow allele over green.

Explanation:

A cross between a pure yellow seeded plant and a green seeded plant is an example of a monohybrid cross. This is because it involves only one trait, which in this case is seed color. Gregor Mendel's experiments with pea plants revealed that yellow is the dominant trait and green is the recessive trait in peas. In a monohybrid cross between true-breeding yellow (YY) and true-breeding green (yy) pea plants, the F1 offspring will all have one allele for yellow seed color and one for green, resulting in a genotype of Yy for each offspring. The Punnett square analysis of this cross will show that 100% of the F1 offspring will have yellow seeds, as yellow is dominant over green.