CAIE A Level Biology 9700 · Inheritance
A species of butterfly, Vanessa cardui, has a diploid chromosome number of 2n = 20. Outline how the processes of meiosis and fertilisation generate genetic variation in the offspring of this butterfly. Your answer should cover the key events in meiosis and the fusion of gametes.
7 marks, so the mark scheme is looking for about 7 separate creditworthy points. Making the same point twice in different words earns it once.
Outline means: Give the main points briefly. Less detail than describe, but every key step has to be there. One short line per step, in order. The marks are for coverage, not depth.
Written by Markquill to follow the Cambridge International syllabus. Markquill is independent and is not affiliated with or endorsed by Cambridge International.