Sexual and Asexual Reproduction

 

Sexual Reproduction

It is the most extented and important way of reproduction between living beings.Its characterized for the production of sexuall cells or gametes. In the sexual reproduction is necessary two individuals, a female individual and male individual.

The three stages of sexual reproduction:

-Gametes Production

They are multicellular beings,gametes are fomred in specialized organs.For example in animals, the organs that produce gametes, the testicles are male gonads form sperms, the ovaries are the female that form ovules.

-Fertilization

It's the union of different sex gametes, this union occurs, a unique cell called zygote or egg is originated by the fusion of gametes.

-Develompent

The zygote is divided and forms and embryo that is the new being in the first stages of his development. The cells embryo continue dividing and trasforming and origin to a new individual.

Asexual Reproduction

This is when an individual living being produces offspring without the participation of sexual cells.
How is the process:
It is made from portions of his own body and the descendants hace the same characteristics than the individual which they come from

Modalities of Asexual Reproduction:

-Bipartition or Binnary fission

The cell is divided into two by DNA  duplication an cytoplasm, the result is genetically identical to his progenitor
 Unicellular Organism:
-Bacteria
-Protozoa
-Algae

-Sporulation

This happens trough spores, small cells formed from a mother cell that suffers divisions.
Mushrooms:
-Mosses
-Ferns
-Sporozoa

-Germination

Is formed trough a bulge called bud or gem, that is a portion of the plasmatic membrane that is from the mother cell to develop.
Germination:
-Yeasts
-Hydras

-Fragmentation

Is formed from a fragment or part of the body  that is separated from the progenitor, is the same process with some plants that are know by "multiplication or vegetable spread"