Which of the following phrases best describes a Punnett Square's usefulness?

• A. To conduct molecular cloning
• B. To visualize genetic dominance
• C. To predict genetic combinations
• D. To analyze ecosystems

Answer: (C)

A Punnett Square is primarily used as a tool to predict the genetic combinations that can result from the crossing of two parent organisms. By outlining the possible alleles contributed by each parent, it graphically represents all potential genotypes of the offspring, allowing for an understanding of the likelihood of inheriting specific traits. This predictive capability is invaluable in genetics, as it provides insights into inheritance patterns, which can be particularly useful in breeding programs, genetic counseling, and understanding genetic disorders.

While the other options represent important concepts in genetics or biology, they do not directly pertain to the specific function of a Punnett Square. For example, molecular cloning is a technique used to manipulate DNA, and analyzing ecosystems involves studying interactions between organisms and their environment, neither of which is the focus of a Punnett Square. Visualizing genetic dominance can occur through a Punnett Square, but it does not encompass its full range of usefulness, which is primarily centered on predicting genetic combinations.