What is Multiple Allelism?? | Multiple Alleles kya hai

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Multiple Alleles or Multiple Allelism
When more than 2 Alleles are present for controlling a single character , this phenomenon is called Multiple Allelism and the Alleles are called Multiple Alleles.
They occupy the same position in a homologous chromosome.
for example - 15 Alleles are responsible for eye colour in Drosophila.
The best example for multiple Allelism is ABO blood group.
The gene responsible for blood group is I gene.
This I gene have 3 Alleles- IA,IB & IO. IA & IB is dominant over IO.
These 3 Alleles are responsible for 4 types of blood groups- A,B,O & AB.
Blood group O contains - 2 Alleles - IO ,IO
Blood group A contains - 2 Alleles - IA ,IA
Blood group B contains - 2 Alleles - IB, IB
Blood group AB contains - 2 Alleles - IA, IB

I hope all the of Multiple Allelism will be clear in this video.
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Занимательная химия
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