Q1 Page 143 - Chapter 9 Class 10 - Heredity and Evolution

If a trait A exists in 10% of a population of an asexually reproducing species and a trait B exists in 60% of the same population, which trait is likely to have arisen earlier?

Answer:

Trait B is present in a higher percentage of the species. 

• It has likely had more time to develop and spread to 60% of the population.
• So it is likely to have appeared earlier .
• Trait A must be relatively new as it is present in only 10% of the population.