International A Level Biology / Mitosis, meiosis and reproduction

Fertilisation in flowering plants

Edexcel International A Level Biology (YBI11), chapter 8: Mitosis, meiosis and reproduction, specification point 3.13. Part of the full course.

Read the revision notes · International A Level Biology past papers

In flowering plants, a pollen tube carries two male nuclei from the stigma into the ovule. They take part in double fertilisation, forming a diploid zygote and a triploid endosperm nucleus.

More lessons in Mitosis, meiosis and reproduction

• The cell cycle
• The stages of mitosis
• Core practical 6: the root tip squash
• Calculating the mitotic index
• Meiosis: two divisions, four haploid cells
• Independent assortment and crossing over
• Loci and linked genes
• Sperm and egg: specialised gametes
• Fertilisation in mammals
• Investigating pollen tube growth