Agel contains two bands from a single str region on chromosome 5 for a heterozygous mother and two different bands for a heterozygous father. how many bands should be identical in size when comparing the heterozygous mother and her biological child?

If a gel contains two bands from a single STR region on chromosome 5 for a heterozygous mother and two different bands for a heterozygous father.

The number of bands that would be identical in size when comparing the heterozygous mother and her biological child would be : THREE (3).

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