(a)[3]
In most plant and animal species, the cell produced by fertilisation is diploid and has homologous chromosomes. Explain why the cell produced by fertilisation is a diploid cell and contains homologous chromosomes.
(b)[2]
State the stage in meiosis at which reduction division happens and explain why you selected it.
(c(i))[2]
Identify the meiosis stages shown in Fig. 4.1 and Fig. 4.2. Fig. 4.1 ........................................................ Fig. 4.2 ........................................................
(c(ii))[1]
The cells produced at the end of meiosis in a $Lilium$ pollen mother cell each contain $12$ chromosomes. State the number of sister chromatids present in a $Lilium$ pollen mother cell at the start of meiosis.