Which of the following makes it possible to predict genotype and phenotype of the offspring of sexual reproduction?

Question

Quizplus · Accepted Answer

By using a diagram called a Punnett square, it is possible to predict genotypes and phenotypes of the offspring of sexual reproduction. 
For every trait expressed in a sexually reproducing organism, there are at least two alternative versions of a gene, called alleles.
In a Punnett square, alleles are placed one per column for one gene and one per row for the other gene. The Punnett square can be used to cross any number of different traits simultaneously. A probability of phenotypes that will be produced can be determined.
In the example Punnett Square below, the two parents have genotypes PP and Pp. 50% of their offspring will have the dominant feature, while 50% will have the recessive.
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Which of the Following Makes It Possible to Predict Genotype