Ok im in class right now and were practicing and I just want to know if this is right?

Depending on the organism the number of in a cell may change

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

Asegment of dna that codes for rna and a protein is a