The diagram shows the distribution of heights in a group of men between the ages of 18 and 23 - Leaving Cert Biology - Question 2 - 2004
Question 2
The diagram shows the distribution of heights in a group of men between the ages of 18 and 23.
What term is used by biologists to describe differences within a popu... show full transcript
Worked Solution & Example Answer:The diagram shows the distribution of heights in a group of men between the ages of 18 and 23 - Leaving Cert Biology - Question 2 - 2004
Step 1
What term is used by biologists to describe differences within a population with respect to features such as height?
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Answer
The term used is 'Variation'. It refers to the differences among individuals in a population concerning traits, such as height.
Step 2
State two factors that could be responsible for the differences shown.
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Answer
Genetic factors, such as inherited genes that influence height.
Environmental factors, such as nutrition and health during developmental years.
Step 3
Would you expect a similar distribution if the students were weighed instead of being measured for height?
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Answer
No, I would not expect a similar distribution. While height and weight both follow a normal distribution pattern influenced by genetic and environmental factors, they are different traits. Weight can be affected by dietary habits, physical activity, and metabolism, resulting in a different distribution.
Step 4
What is a mutation?
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A mutation is a change in the DNA sequence of an organism's genome. It can be caused by various factors, including environmental influences or errors during DNA replication.
Step 5
State one cause of mutation.
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One cause of mutation is exposure to radiation, which can alter the DNA structure.
Step 6
Give an example of a condition, found in the human population, that results from a mutation.
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An example of a condition resulting from a mutation is Down syndrome, which can occur due to an extra copy of chromosome 21.
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