Variation (5.1.2)

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What is discontinuous variation?
Qualitative differences between phenotypes. Organisms fall into clear-cut categories.
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What is continuous variation?
Quantitative differences between phenotypes. There are no distinct categories, but a continuous range of values between two extremes.
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What is monogenetic inheritence?
Where just one gene is involved in a characteristic.
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Give a summary of discontinuous variation.
Different alleles of a single gene have large effects on the phenotype. If several genes are involved, each has quite different effects on the phenotype.
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Give a summary of continuous variation.
Characteristics controlled by 2 or more genes. Each gene provides an additive component of the phenotype. A large number of different genes may have a combined effect on the phenotype. These are known as polygenes.
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How is there variation in intelligence?
This is partly determined by genes and partly dependent on external stimuli- the learning environment at home and at school, interaction with others etc.
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What is the gene pool?
The total genetic information possessed by the reproductive members of a population of organisms.
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Other cards in this set

Card 2

Front

What is continuous variation?

Back

Quantitative differences between phenotypes. There are no distinct categories, but a continuous range of values between two extremes.

Card 3

Front

What is monogenetic inheritence?

Back

Preview of the front of card 3

Card 4

Front

Give a summary of discontinuous variation.

Back

Preview of the front of card 4

Card 5

Front

Give a summary of continuous variation.

Back

Preview of the front of card 5
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