Some processes involved in evolution are shown - Scottish Highers Biology - Question 19 - 2018
Question 19
Some processes involved in evolution are shown.
1 sexual selection
2 disruptive selection
3 genetic drift
Which of these processes involve non-random changes in... show full transcript
Worked Solution & Example Answer:Some processes involved in evolution are shown - Scottish Highers Biology - Question 19 - 2018
Step 1
1 sexual selection
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Answer
Sexual selection is a non-random process where individuals with certain desirable traits are chosen by mates more often than others, impacting the frequency of those traits in the population.
Step 2
2 disruptive selection
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Answer
Disruptive selection can also be viewed as a non-random change, as it favors individuals at both extremes of a trait spectrum while selecting against the average phenotype.
Step 3
3 genetic drift
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Answer
In contrast, genetic drift is a random process that can lead to changes in allele frequencies due to chance events, and therefore does not involve non-random changes.
Step 4
Final Answer
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Answer
Based on the above reasoning, the processes involving non-random changes in the frequency of DNA sequences are 1 and 2 only. Therefore, the correct option is A.
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