Question

explain the sexual reproduction in plant

Answer 1

Dear student
Sexual reproduction in flowering plants involves:
1. the production of male and female gametes: Through meiosis, the genes of the organism are rearranged to produce gametophyte and the number of chromosomes is reduced to half i.e Haploid. The Gametophyte then produces the Male or Female Gametes by cell division or mitosis.
2. the transfer of the male gametes to the female ovules in a process called pollination. It is a process through which the pollen grain from an anther (male gamete) lands on to the stigma and gradually mates with the ovule (female gamete).
3. After pollination occurs, fertilization happens and the ovules grow into seeds within a fruit. It involves union of both haploid male and Female ‘Gametes’ to form a Diploid Zygote, which then develops into the offspring.

Fertilization in flowering plants is unique among all known organisms, in that not one but two cells are fertilized, in a process called Double Fertilization. One sperm nucleus in the pollen tube fuses with the egg cell in the embryo sac, and the other sperm nucleus fuses with the diploid endosperm nucleus. The fertilized egg cell is a zygote that develops into the diploid embryo of the sporophyte. The fertilized endosperm nucleus develops into the triploid endosperm, a nutritive tissue that sustains the embryo and seedling. The matured and fertilized ovules form the seeds whereas the the fruits are formed from the mature ovaries.
REGARDS