Saturday, June 24, 2017

3.28: Understand that Variation Within a Species can be Genetic, Environmental, or a Combination of Both

VARIATION: Differences Between Individuals Within a Species

VARIATION WITHIN SPECIES:

GENETICS
ENVIRONMENT
Diagram showing the inheritance of Eye Colour from Genetics
Diagram showing Variation caused by the Environment
EXPLANATION:
Variation in a Species can be Caused by Genetics by the Inheritance of Genes and Alleles from Parents
EXPLANATION:
Variation in a Species can be Caused by Environmental Factors, Causing Organisms to Adapt or Change
EXAMPLES:

  • Eye Colour
  • Hair Colour
  • Blood Type
  • Inherited Disorders

EXAMPLES:

  • Lifestyle
  • Climate
  • Diet
  • Culture
BOTH GENETIC AND ENVIRONMENT
Diagram showing How Both Genetic and Environmental Factors can cause Variation
EXPLANATION:

Variation can be Influenced by Both Genetic and Environmental Factors as although Genes Decide what Characteristics we Inherit, Our Surrounding Environment will Affect How these Inherited Characteristics Develop.

EXAMPLE:

  1. PLANTS
  • Plants May have the Potential for Strong Growth, but if they Do Not Receive Sufficient Mineral Resources from the Soil, they may Hardly Grow at All

    2.   CHILD
  • A Child might Inherit the Tendency to be Tall, but a Poor Diet during Childhood will Cause Poor Growth

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