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13 Cards in this Set
- Front
- Back
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Interspecific variation |
If one species differs from another. |
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Intraspecifc variation |
If members of the same species differ from each other. |
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Sampling |
Involves taking measurements of individuals, selected from the population of organisms which is being investigated. |
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Sampling bias |
The selection process may be biased. The investigators may be making unrepresentative choices, either deliberately or unwittingly. |
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Chance |
The absence of any cause of events that can be predicted. |
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Random sampling |
A method of selecting a sample from a statistical population in such a way that every possible sample that could be selected has a predetermined probability of being selected. |
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Mutations |
A sudden change in the amount or the arrangement of the genetic material in the cell. |
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Meiosis |
The type of nuclear division in which the number of chromosomes is halved. |
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Fusion of gametes |
When gametes fuse with each other at fertilisation. It is a random process. |
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Genetic factors |
The factors that are controlled, usually by a single gene. |
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Environmental factors |
The factors that contribute to variations, but not genetically. |
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Mean |
The measurement at the maximum height of the curve. It provides an average value. |
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Standard deviation |
A measure of the width of the curve. It gives and indication of the range of values either side of the mean. |
