Apunnett square is used to determine the __

A punnett square is used to determine the phenotypes of a child.

Explanation:

The genotypes of both parents are listed on the punnett square which is then crossed.

Dominant and Recessive traits:

When crossed, each parents have their own dominant and recessive traits, the dominant trait always shows up on the child when mixed with a recessive trait.

answer; atp and nadph;