CAIE A Level Biology 9700 · Inheritance
A species of orchid has a diploid chromosome number of 12 (2n = 12). Describe the key events that occur during meiosis in the cells of this orchid that lead to the formation of haploid gametes, and explain why a reduction division is essential before fertilisation can take place.
5 marks, so the mark scheme is looking for about 5 separate creditworthy points. Making the same point twice in different words earns it once.
Describe means: Say what happens or what something is like, in order and with detail. You are not being asked why. If there is data, quote it: name the trend, then give figures with units at the points where it changes.
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