When members of the same species differ from each other.
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Sampling
This involves taking measurements of individual, selected from the population being investigated. if these individuals are representative then the measurements can be relied upon.
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Sampling bias
The selection process may be biased. The investigators may make unrepresentative choices.
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Chance
The individuals chosen may not be representative.
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Variation is the result of two main factors...
Genetic differences and environmental influences
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Mutations
These sudden changes to genes and chromosomes may be passed to the next generation.
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Meiosis
This form of nuclear division forms the gametes. This mixes the genetic material before it is passed to the gametes.
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Fusion of gametes
In sexual reproduction, offspring inherit some characteristics of each parent. Which gamete fuses with which a random process adds to variation.
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Environmental influences...
Light, Climatic conditions, Soil conditions, pH, and Food availability.
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Nucleotide Structure...
A phosphate group, A sugar called deoxyribose and an organic base belonging to one of two groups; - Single ringed: cytosine and thymine. - Double ringed: adenine and guanine.
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Other cards in this set
Card 2
Front
When members of the same species differ from each other.
Back
Intraspecific variation
Card 3
Front
This involves taking measurements of individual, selected from the population being investigated. if these individuals are representative then the measurements can be relied upon.
Back
Card 4
Front
The selection process may be biased. The investigators may make unrepresentative choices.
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