| The Y chromosome DNA test can be useful in | | | | biologically related or not. The results therefore |
| certain cases where a normal DNA paternity test | | | | have to be interpreted within the circumstances |
| cannot be performed. The Y chromosome is | | | | of the case and other possible DNA tests |
| present only in males and passed on through the | | | | performed with other members of the family. |
| male lineage of a family, that is from father to | | | | The Y chromosome DNA test can also be used in |
| son to the grandson and so forth. Therefore | | | | cases of infidelity testing to confirm if a biological |
| determining whether two males have the same Y | | | | trace is male or female. Since only males have |
| chromosome will assist in determining their | | | | the Y chromosome, the test can be used to |
| biological relationship. The DNA test can be applied | | | | determine if, for example, stains found on a pair |
| for testing between male cousins, grandfather and | | | | of underwear is male or female. The DNA profile |
| grandson, uncles and nephews etc. | | | | obtained can then be matched to the donor if a |
| The only caveat of this DNA test is that the test | | | | sample is available for DNA testing. The |
| will not pinpoint exactly who the father is in cases | | | | applications of this DNA test also extend to other |
| where related males are possible fathers (e.g. two | | | | areas of DNA Forensic work such as in the |
| brothers) but will confirm whether they are | | | | analysis of scene of the crime samples. |