Reporduction
The cells in the bodies of most multicellular organisms are diploid
Diploid - two matching sets of chromosomes

Multicellular organisms produce sex cells called gametes which are haploid.
Haploid - one set of chromosomes
Gametes are either male or female.

Reproduction in flowering plants
In flowering plants the gametes are produced in the flowers.
Male gametes are inside the pollen grains in the anthers of flowers.
Female gametes are inside the ovules produced in the ovaries

During pollination, pollen grains are carried by wind or animals and land on the stigma of a flower where they germinate. A pollen tube grows into the ovary, where it reaches an ovule. The nucleus of the pollen grain then passes along the pollen tube and joins with a nucleus in the ovule. The fusion of haploid gametes produces a diploid zygote.

	Criado por Ashley Macleod mais de 10 anos atrás

Notas sobre Reproduction, criado por Ashley Macleod em 11-05-2014.