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Elan Coil [88]
3 years ago
7

How are alleles formed?

Advanced Placement (AP)
1 answer:
vichka [17]3 years ago
4 0
They are formed by mutations. Mutations are random changes. The most common one is a base substitution. One base in the sequence of a gene Is replaced by another.
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hope this helps... load for images!

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