Question

define asexual reproduction ??

Answer 1

Asexual reproduction is a type of reproduction by which offspring arise from a single organism, and inherit the genes of that parent only; it does not involve the fusion of gametes, and almost never changes the number of chromosomes

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Answer 2

☻ Asexual reproduction ☻

Formation of new individuals from the cells of a single parent known as asexual reproduction.

● Types of asexual reproduction.

There are major 6 types of asexual reproduction :-

1 ) = Binary fission

2 ) = Fragmentation

3 ) = Budding

4 ) = Spore formation

5 ) = Regeneration

6 ) = Vegetative propagation.

● Fission

There are two of Fission :-

1 ) = Binary Fission

2 } = Multiple Fission

● Binary fission

Fission means " splitting into two " In binary fission the nucleus of the Amoeba rapidly divides into two nucleic after the division of cytoplasm , the two daughter cells are formed.

Two examples of binary fission = Amoeba and Leishmania.

2. Multiple fission

The parent cell divides into many daughter cells.

e.g. Plasmodium.

● Fragmentation

It is the accidental process when broken pieces of an organism grows in a complete organism.

It occurs in multicellular organism.

Two examples are :-Lichens , Flatworms

● Budding

The process by which a bud develops as a outgrowth on parent body.

When these buds become mature these buds detach from the parent body.

Two examples are :- Hydra and Yeast

● Spore formation

Spores are covered by thick walls they protect them until they come in contact with suitable conditions.

They produce new individuals under favourable conditions

Two examples are - Ferns , Mosses

● Regeneration

When simple animals develop a new individuals from their broken older parts it is known as regeneration.

Two examples of regeneration are - Planaria , Sea Star

● Vegetative propagation

In vegetative propagation reproduction takes place from the vegetative parts like stem , roots and leaves.

Method for vegetation propagation

● Natural

1 ) = By grafting - Dahlias

2 ) = By stems - potatoes

3 ) = By leaves - Bryophyllum

● Artificial

1 ) = Grafting - Mango

2 ) = Cutting - Rose

3 )= Layering - Jasmine

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