If you are hiking and find fossils, can you dig them up

Ayoung boy has been found and police are trying to locate his family they take a dna sample from him and begin collec dna samples from families who have missing children if police use dna samples only from the fathers, which type of dn technology can they use to identify the boy's parent? y-chromosome analysis omtdna (mitochondrial dna) analysis vntrs (variable tandem repeats) o pcr (polymerase chain reaction) analysis

Why does it matter if osmosis is put into a “scab” or a “nosebleed? ” where would that leave him?

Crossing over is a method of (blank)?