Scientists investigated the reproductive success of transferring cloned embryo cells into surrogate female goats (does).
In total, 1600 cloned embryos were transferred, resulting in 364 pregnancies. From these pregnancies, 68 newborn kids were successfully born.
Calculate the percentage of transferred embryos that successfully developed into newborn kids. Show your working.
The formation of a placenta is essential for the successful development of a mammalian embryo into a fetus.
Name the specific organ in the female reproductive tract where the placenta forms and attaches.
Suggest how the structure of the placenta is adapted to allow the efficient exchange of substances between the mother and the fetus.
Newborn kids feed on colostrum and milk from their mothers. Suggest how the components of milk help the kids to survive and develop.
39 exam-style questions on Edexcel IGCSE Biology Cloning. Each one has a worked solution and a mark scheme showing where the marks go.