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reproduction define

bio

TermDefinition
External Fertilisation is a mode of reproduction in which a male organism's sperm fertilizes a female organism's egg outside of the female's body.
Internal fertilisation the union of an egg cell with a sperm during sexual reproduction inside the female body.
Oviparity Fertilised eggs are laid outside the females body and develop there receiving nourishment from the yolk of the egg.
Ovoviviparity fertilised eggs are retained in the female, but the embryo obtains its nourishment from the eggs yolk and the young are fully developed when they hatch.
Viviparity the young develop within the female receiving nourishment from the mothers blood through a placenta. the offspring develops in the female is born alive.
Self pollination pollen transfer takes place between the anther and stigma of the same flower.
Anther the part of a stamen that contains the pollen
Stigma The part of the pistil where pollen germinates.
Pistil he ovule producing part of a flower.
Cross pollination pollen transfer takes place between different flowers of the same species.
Grafting two plant species are used one is cut at an angle that part is attached to the plant in the ground and held together.
Cutting a portion of the stem of a plant is cut and is planted to grow.
Layering a stem is attached to a plant bent and covered in soil.
Microprogation a part of a plant is sterilised and plant material is placed on a plant tissue culture medium( minerals, vitamins), from this a plant grows.
Fungi sexual reproduction produce spores that disperse and find another spore of the same species and create a zygote.
Fungi asexual reproduction a bulge forms on the side if the cell nucleus it divides and the bud detaches itself from the mother cell. asexual spores are released that are identical to its parent.
Bacteria reproduction DNA copying begins at the origin of replication. the to origins move towards opposite ends of the cell, pulling the rest of the DNA with them. the cell is split in two now there is wo bacteria cells.
IVF egg is fertilised outside of mothers body and is implanted back inside once zygote has formed.
Asexual plant reproduction part of a plant is used to generate a new plant.
Sexual reproduction of plants pollination.
Diploid a cell or nucleus containing two complete sets of chromosomes one from each parent.
Haploid having a single set of unpaired chromosomes.
Nodes A plant stem's nodes are those critical areas from which leaves, branches, and aerial roots grow out from the stem
Internodes are intervals between the nodes.
Fertilisation the action or process of fertilizing an egg or a female animal or plant, involving the fusion of male and female gametes to form a zygote.
Implantation The process in witch a developing embryo, moving as a blastocyst through the uterus makes contact with the lining of the uterus and remains attached until birth.
Blastocyst A blastocyst forms when a fertilized egg is in its second phase of growth. Ball of dividing cells.
Endometrium the mucous membrane lining the uterus, which thickens during the menstrual cycle in preparation for possible implantation of an embryo.
Cloning the production of an individual that is genetically identical to one that already exists. three types
Reproductive cloning creating a genetically identical fully developed organism, using a cell( or a few) from another mature organism.
Therapeutic cloning involves using cells from an individual to produce a cloned early embryo, which is then used as a source of embryonic stem cells to replace degenerating adult tissue or to repair damage.
Gene cloning occurs at the cellular level and involves producing identical copies of a gene.
Biotechnology is any technique that uses living organisms to make products.
Genetically modify add or remove genes
Transgenics organism or species that has been created by moving a gene from one species and inserting it into the DNA of another.
Gene therapy A copy of a gene is inserted into defective tissue.
Created by: Trinjb
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