A gene discovery technique that looks at regions of the genome where individuals have the same alleles much more often than expected by chance, because their ancestors were blood relatives, is called:

Explanation:

Homozygosity mapping  

Homozygosity mapping is also known as autozygosity mapping.

It is a common method for mapping recessive traits in consanguineous(related families) families.

And it also serve as an extremely powerful tool in the clinical genetics and many other fields.

It is based on a mutation happening in a founder person on one chromosome.

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