Tuesday, August 12, 2025

WHAT IS VARIATION? LIST TWO MAIN REASONS THAT MAY LEAD TO VARIATION IN A POPULATION?

 

Variation is the difference in characteristics or traits among individuals of the same species.
It means no two organisms are exactly alike in appearance, behavior, or genetic makeup.

Two main reasons for variation in a population:

  1. Genetic causes – Differences in DNA due to sexual reproduction (recombination of genes) or mutations in genes.

  2. Environmental causes – Influence of surroundings such as climate, nutrition, lifestyle, or exposure to diseases, which can change the way traits are expressed.

So, variation comes from a mix of what’s in the genes and what’s in the environment.
VARIATION


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