Distinguish between dominant and recissive traits

Dominant traits are those traits which are expressed even in the presence of one copy of an allele for a particular trait in the gene.For example: Yy shows the dominant trait for yellow color of seed. Seed is yellow even when single copy of dominant allele i.e. Y is present.

Recessive traits are those that are expressed only when two copies of an allele are present in the gene. For example: yy shows the recessive trait for green colour of the seed. It is expressed only when both the alleles are recessive i.e. y.