(a)[4]
State, using letters J-N in Fig. 2.1, all the stages that show: anaphase; cells containing pairs of homologous chromosomes; crossing over; haploid cells.
(b)[2]
Maize plants have both male and female reproductive organs on the same plant. The male anthers are found on structures called tassels. When selective breeding is used to produce an F1 hybrid, the tassels are removed. Suggest why the tassels are removed when selective breeding is used to produce an F1 hybrid.
(c)[4]
Outline how selective breeding can be used to produce vigorous, uniform maize varieties.