Define the different type of natural parthanogenesis?
Answers
Answer:
Explanation:
Parthenogenesis is the type of asexual reproduction involving the development of female gametes without any fertilization.” Animals such as bees, wasps, ants have no sex chromosomes. ... A few organisms such as crayfish, snakes, komodo dragons and sharks can reproduce sexually as well as by parthenogenesis.
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Explanation:
Parthenogenesis is the type of asexual reproduction involving the development of female gametes without any fertilization.
There are two types of parthenogenesis:
Natural Parthenogenesis
Artificial Parthenogenesis
1) Natural Parthenogenesis
In certain animals, parthenogenesis occurs naturally in their life cycles. This is known as natural parthenogenesis.
Natural parthenogenesis can be further divided into:
Complete Parthenogenesis
A few insects have no males and no sexual phase. Such organisms depend upon self-reproduction. This is known as complete parthenogenesis.
Incomplete Parthenogenesis
The life cycle of a few insects involves two generations:
Sexual generation
Parthenogenesis generation
In this, the unfertilised eggs produce males and the diploid eggs produce females. This type of parthenogenesis is called partial or incomplete parthenogenesis.
2) Artificial Parthenogenesis
The fertilised eggs might sometimes develop parthenogenetically by various chemical and physical means. This is known as artificial parthenogenesis.
Physical Means
Temperature induces parthenogenesis in eggs. For eg., parthenogenesis is induced if an egg is transferred from -30 to -10°C.
Parthenogenesis is caused by ultraviolet light.
Electrical shocks cause parthenogenesis.
When an egg is pricked by a needle, the development occurs parthenogenetically.
Chemical Means
The chemicals that are responsible for the parthenogenesis of eggs are:
1) Chloroform
2)Urea and Sucrose
3)Strychnine
4) Fat solvents
5)Acids
6) Chlorides