Biology 9700 · AS & A Level · Control and coordination in mammals
Control and coordination in mammals — practice question
Fig. 5.1 illustrates several of the stages involved in in-vitro fertilisation (IVF).
(a)[2]
Explain the mechanism by which egg production is stimulated at step 1.
(b)[2]
After step 3 in Fig. 5.1, the sperm sample is placed in a nutrient-containing solution with other substances for up to one hour before it is added to the eggs. Explain why this is done.
(c(i))[2]
Suggest one advantage of using this new technique in the IVF procedure.
(c(ii))[2]
Suggest one disadvantage of using this technique.
Worked solution & mark scheme
This 8-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Correctly refer to the woman being given hormones, e.g. FSH / LH / GnRH agonist” …