Class 10 Botany simulations · How do Organisms Reproduce?

Double fertilisation

Follow a pollen tube down the style into the embryo sac, where two male gametes take part in two separate fusions.

Open the simulation

What to notice

Double fertilisation — two fusions in one embryo sac — is unique to flowering plants.

Key relation

Syngamy: n + n → 2n zygote ; triple fusion: n + n + n → 3n PEN

Try this

Pause at triple fusion. Which three nuclei fuse?

What you can change

• Speed: 0.3 to 2 ×

More in How do Organisms Reproduce?

• Bacterial shapes and binary fission
• Menstrual cycle: ovary, uterus and hormones
• Mitosis, stage by stage
• Kinds and agents of pollination

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