Asexual Asexual ReproductionReproduction

In In AnimalsAnimals

Asexual Asexual ReproductionReproduction Type of reproduction in which a Type of reproduction in which a

new organism is produced from new organism is produced from ONEONE parent and the offspring is parent and the offspring is identicalidentical to the parent. to the parent.

Occurs in most plants, bacteria, Occurs in most plants, bacteria, protists, and low invertebrates.protists, and low invertebrates.

Asexual Asexual ReproductionReproduction One parentOne parent Offspring Offspring

are identical are identical to the parents.to the parents. One

Parent

Identical Offspring

Asexual Asexual ReproductionReproduction Types of Asexual ReproductionTypes of Asexual Reproduction

Asexual Reproduction occurs in Asexual Reproduction occurs in many ways. The common types are,many ways. The common types are,

1.1.FissionFission2.2.BuddingBudding3.3.RegenerationRegeneration4.4.ParthenogenesisParthenogenesis5.5.CloningCloning6.6.TwinsTwins

Asexual Asexual ReproductionReproduction

Types of Asexual ReproductionTypes of Asexual Reproduction BinaryBinary FissionFission – the simplest method – the simplest method

of asexual reproduction in which the of asexual reproduction in which the parent body divided into two or more parent body divided into two or more parts & each of which develop into a new parts & each of which develop into a new individual.individual. Example: Example: Amoeba, Plasmodium, Paramecium.Amoeba, Plasmodium, Paramecium.

Simple binary fission in Amoeba

Asexual Asexual ReproductionReproduction Types of Asexual Types of Asexual

ReproductionReproduction BuddingBudding – organism that produces – organism that produces

a bud that a bud that breaksbreaks awayaway to live on to live on its own.its own. Example: Example: Hydra, Corals.Hydra, Corals.

Asexual Asexual ReproductionReproduction

Types of Asexual ReproductionTypes of Asexual Reproduction Regeneration – – occurs when a

body part has broken off and the organism grows a new one.

Example: Star-fish

Asexual Asexual ReproductionReproduction

Types of Asexual ReproductionTypes of Asexual Reproduction Parthenogenesis –– is a form of asexual

reproduction in which females produce eggs that develop without fertilization. Parthenogenesis is seen to occur naturally in some invertebrates, along with several fish, amphibians, and reptiles as well as in many plants.

It is common in ; Honey-bees , Ants , Wasps.It is common in ; Honey-bees , Ants , Wasps.

Asexual Asexual ReproductionReproduction

Types of Asexual ReproductionTypes of Asexual Reproduction Cloning – – the modern technology of

biological science in which similar copies of genetic material are produced.

The organisms which are developed in cloning are identical.

Example: Twins, Cancer

Asexual Asexual ReproductionReproduction

Types of Asexual ReproductionTypes of Asexual Reproduction Twins – – are the children which have similar

development & their birth is almost at the same time.

There are two types of twins:a. Identical Twins – developed from one zygote , after – developed from one zygote , after

fertilization it divided into two. Mitosis is involvedfertilization it divided into two. Mitosis is involvedb. Fraternal Twins – developed from two diff. zygote. – developed from two diff. zygote.

Each egg is fertilized by separate sperm.Each egg is fertilized by separate sperm.