1_biology

variation

• The differences in the characters among the individuals of a species is called variation
• for example: free earlobe or attached earlobe
• is a variation found in human population.
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Accumulation of variation

• The significant of a variation shows up only if it continues to be inherited by the offspring for several generation. the great advantage of variation to a species is that it increases the chance of its survival in changing enviroment

Slide 3

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• A gene is the unit of DNA on chromosomes which governs the synthesis of one protein that controls a specific characteristics of an organism. genes transfer CHARACTERISTICS from parents to offspring.

Rules for inheritance of traits

• https://www.youtube.com/watch?v=Mehz7tCxjSE (Embed)
• Caption: Mendel's pea experiment