Some alleles are dominant and others are recessive. an organism with at least one dominant allele for a particular form of a trait will exhibit that form of the trait. an organism with a recessive allele for a particular form of a trait will exhibit that form only when the dominant allele for the trait is not present. this states the

Recessive alleles can only show up when there are no dominants. If a mother has brown eyes and a father has green eyes, the offspring has a bigger chance of having brown eyes. In this case, brown eyes are dominant and green eyes are recessive. If the mother and father have green eyes, the offspring is most likely to have green eyes. In this case, green eyes are recessive.

Explanation:

When we take a breath, we pull air into our lungs that contains mostly nitrogen and oxygen. When we exhale, we breathe out mostly carbon dioxide.