- Created by: LamisDK
- Created on: 29-11-17 12:44
A process resulting in the production of genetically identical offspring from one parent
A process involving the fusion of the nuclei of two gametes to form a zygote and the production of offspring that are genetically different from each other
Sexual reproduction (terms)
Zygote:the new cell which is formed by fertilization.
Diploid:a cell which has the full number of chromosomes ,with two complete sets.
Haploid:a cell which only has a single set .
Fertilization:the fusion of male gamete and female gamete to form a zygote.
Male gametes and female gametes
Female gamete in plants are called ovules
Male gametes are found inside the pollen grains
Structure of flower (terms)
Stigma:the part of the flower which receives pollen.
Style:the connection between the stigma and ovary of a flower.
Stamen:the male parts of a flower.
Nectary:a gland producing a sugary fluid,found in many insect-pollinated flowers.
Filament:the stalk of a stamen.
Anther:the part of a stamen in which pollen is produced.
Pollen grains:tough,resistant structures containing the male gametes of a flower.
Pollination:the transfer of pollen from the male part of the flower (anther of stamen) to the female part of the plant (stigma).
Ovary:an organ in which female gametes are made.
Ovule:a structure in the ovary of a flower which contains a female gamete.
Tip:do not use the word ‘flower’ when you mean ‘plant’.a plant is a complete organism but a flower is just part of a plant.
Wind-pollinated and insect pollinated
4.anthers inside flower
5.stigma inside flower
6.spiky pollen grains
7.large quantities of pollen made
2.no scent,no nectaries
3.anthers outside flower,stigmas outside flower
4.light pollen,smooth pollen
5.large quantities of pollen produced
Self-pollination and cross-pollination
Self pollination:the transfer of pollen grains from the anther of a flower to the stigma of the same flower,or a different flower on the same plant.
Cross-pollination:the transfer of pollen grains from the anther of a flower to the stigma of a flower on a different plant of the same species.
Seed germination factors
Water must be present