EVOLUTION
SOURCES OF VARIATION IN A POPULATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It is a quantitative variation
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It is influenced by genetic and environmental factors
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An example is weight
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The characteristics in this variation fall into distinct categories
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Detailed explanation-1: -Discontinuous variation refers to things like eye colour or blood group, which have a limited number of possible values. In other words, a person’s blood can be A, B, AB or O, but it can’t be anything in between.
Detailed explanation-2: -Human blood groups are another great example of discontinuous (discrete) variation. There are only four possible distinct blood groups. They are A, B, AB, or O.
Detailed explanation-3: -So, the correct answer is ‘Mutations’
Detailed explanation-4: -Discontinuous variations are caused by sudden unpredictable changes in the chromosome or gene mutation. These are usually concerned with qualitative traits, which means that they would not include any intermediate stages of phenotypes.