How can mitochondrial DNA be used to trace ancestry?

Human mitochondrial DNA is much smaller than human nuclear DNA. ... For both of these reasons, the sequence of mitochondrial DNA stays the same over generations, and thus is a useful tool for looking at maternal ancestry. Scientists have found that the mitochondrial genome mutates 5-‐10 times faster than nuclear DNA.

Explanation:

mitochondrial is used for storage, so ancestral dna in cells can stay in mitochondria and being passed on

Explanation:

b exhibiting favoritism toward the kikuyu people.

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products