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
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Sexual selection is a type of natural selection where individuals with certain inherited characteristics are more likely than others to obtain mates. This involves non-random changes in allele frequencies as those traits become more common due to mating preferences.
Step 2
2 disruptive selection
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Disruptive selection occurs when individuals at both extremes of a trait are favored over intermediate phenotypes. This selection process is also non-random, as it specifically favors certain phenotypes that lead to changes in allele frequencies.
Step 3
3 genetic drift
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Genetic drift is a random process that leads to changes in allele frequencies due to chance events, such as a natural disaster. Therefore, it does not involve non-random changes in the frequency of DNA sequences.
Step 4
Which of these processes involve non-random changes in the frequency of DNA sequences?
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Based on the analyses above, only processes 1 (sexual selection) and 2 (disruptive selection) involve non-random changes in allele frequencies. Thus, the correct answer is A: 1 and 2 only.
Join the Scottish Highers students using SimpleStudy...
