GENETICS AND EVOLUTION
GENETIC BASIS OF INHERITANCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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weight
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IQ (intelligence quotient)
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skin colour
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left or right handedness
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Detailed explanation-1: -Discontinuous Variation This type of variation has distinct groups or categories which individuals fit into. Tongue rolling, handedness (left or right) and blood groups are examples. You can either roll your tongue or you cannot.
Detailed explanation-2: -Examples of discontinuous variation include a person’s blood group or the color of a species of bird. These variations can exist for two major reasons. They could be purely random genetic changes, or they can be traits that have been influenced and selected by the environment.
Detailed explanation-3: -Which are examples of discontinuous variation? Discontinuous: Eye colour, handedness & lobed/lobeless ears. Continuous: Hand span, arm length & height.
Detailed explanation-4: -Human blood group is an example of discontinuous variation. In the ABO blood group system, only four blood groups are possible (A, B, AB or O). There are no values in between, so this is discontinuous variation. Here are some examples: blood group, sex (male or female), eye color etc.