Question

Write two points of difference between asexual and sexual types of reproduction. Describe why variations are observed in the offspring formed by sexual reproduction.

Answer 1

Asexual Reproduction	Sexual Reproduction
It involves only one parent.	It generally involves two parents of opposite sex (male and female).
It generally does not involve production of gametes.	It involves the formation of gametes.
There is no fertilisation and formation of zygote.	Fertilisation occurs and results in the formation of zygote.
Asexually produced offspring resemble to each other and their parents.	Sexually produced offspring show some variations from their parents.
In asexual reproduction, very less chance of variations occur.	In sexual reproduction, more chances of variations occur.

Gametes involved in sexual reproduction possess some variations due to inaccuracy in DNA copying mechanisms. When male and female gametes fuse, their variations combine thus creating new combinations of variations in the offspring. Thus, offspring formed by sexual reproduction possess variations.