A karyotype is a visual representation of an individual's chromosomes, arranged and organized in a specific pattern.

Study the diagram given below and answer the questions that follow:
(i) Name the cells of the pancreas that produce glucagon and insulin.
(ii) State the main function of glucagon and insulin.
(iii) What is the technical term for the cells of the pancreas that produce hormones?

Gametes must be produced by meiosis. Explain.