Which of the following best illustrates the concept of genetic diversity?

• A. The use of a single crop species
• B. Variations in alleles among population members
• C. Uniformity in genetic traits
• D. The application of genetic engineering to all varieties

Answer: (B)

The concept of genetic diversity refers to the variety of genetic characteristics within a species or population. This diversity is crucial for the resilience and adaptability of populations, enabling them to survive environmental changes, diseases, and other challenges.

Variations in alleles among population members highlight this diversity, as each member of the population can possess different gene variants that influence traits such as coloration, resistance to disease, and adaptability to environmental conditions. High genetic diversity helps populations to be more resilient, as it allows for a greater range of responses to selective pressures.

The other choices indicate lower levels of genetic diversity. The use of a single crop species suggests a lack of genetic variation, increasing vulnerability to disease and environmental stress. Uniformity in genetic traits further illustrates a decrease in genetic diversity, as it implies that individuals share the same genetic characteristics, limiting adaptability. The application of genetic engineering to all varieties can also reduce diversity if it leads to the dominance of genetically modified traits over naturally occurring variations.