Question

explain what a frequency chart can tell you about a discontinuous variable like blood group

Answer 1

Answer:

Continuous and discontinuous variation

Some of the features of the different organisms in a species show continuous variation, and some features show discontinuous variation.

Continuous variation

Human height is an example of continuous variation. It ranges from that of the shortest person in the world to that of the tallest person. Any height is possible between these values. So it is continuous variation.

For any species a characteristic that changes gradually over a range of values shows continuous variation. Examples of such characteristics are:

height

weight

If you record the heights of a group of people and draw a graph of your results, it usually looks something like this:

Chart is roughly symmetrical, with fewer people in the smaller height categories (such as up to 129cm) and fewer people in the taller height categories such as over 175cm. The category with the greatest number of people is 150-154cm

A bar chart to represent variation in height

The more people you measure, and the smaller the categories you use, the closer the results will be to the curved line. This shape of graph is typical of a feature with continuous variation. Weight would give a graph similar in shape to this.

Discontinuous variation

A characteristic of any species with only a limited number of possible values shows discontinuous variation. 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

eye colour

Answer 2

Bar chart

Bar chart a frequency chart can tell you about a discontinuous variable like blood group.

• For data with discontinuous variance, we typically use a bar chart: For data with constant variance, we typically use a line graph: Consequently, variation will naturally be present in living things (they will be different to each other).
• blood type or the colour of a particular kind of bird are examples of discontinuous variation. There are two main reasons why these variances could exist. They may be completely accidental genetic modifications or they may be characteristics that have been shaped and chosen by the environment.
• To compare various categories, a bar graph is utilised. It is employed to represent sporadic, ungrouped data. While continuous, grouped data is represented using a histogram.
• Depending on what you mean by "continuous," Life itself is an illustration of discontinuous variation. Every generation's genome differs from the parents' by a few nucleotides due to random mutations. They don't follow any pattern or sequence. That is inconsistent. On the other hand, the majority of the genome remains mostly unchanged, hence life's variations are both continuous and discontinuous from generation to generation.

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