Y STR Male Lineage DNA Testing
Testing: Two males
Timeframe: 5-7 working days from receipt of samples at the laboratories
Males who need to know whether they share the same biological father or paternal line can opt for our Y chromosome test (Y STR Male lineage test). Our Y chromosome test is highly accurate DNA test that works by comparing the Y chromosome profiles on the DNA of the test participants.
A Y test is a good alternative to a DNA paternity test in instances where the concerned parties need to know whether they share the same father but are unable to include the alleged father in the test.
Science behind the y chromosome test
Y chromosome testing involves analysing Y Short Tandem Repeat sequences – these STRs are essentially just repeated sequences of DNA and the number of repetitions will vary from person to person. The Y chromosome is only found in males and is in fact the sex determining chromosome. The Y chromosome test has some great advantages – the main one being its accuracy and reliability (it is extremely rare to have an inconclusive result). This is due to the low mutation rate of the Y chromosome. The chromosome gets passed down unchanged and is ideal to trace a direct father’s ancestral line.
In this test we analyse a total of 11 genetic markers extracted from the DNA samples provided. A complete match at every genetic marker confirms that the tested males share a common paternal line. The only thing the test result will not tell you the exact nature of relationship between the people tested; if two males share the same paternal line, they could share any direct blood male relative, perhaps a father, grandfather or great grandfather. We leave it up to the test participants to make their own deductions and conclusions based upon the result of the test.
Sample collection for our y chromosome test
Samples for a Y test can easily be collected with our home sample kit which we send to you as soon as we have received your payment. We require 2 mouth swab samples per person to be tested. Instructions and consent forms are provided inside the kit.
Note: We can only guarantee standard result turnaround time when testing takes place solely using oral swab samples. Using a forensic sample for your test may lead to an increase in turnaround time.
What test do I need if participants are male and female?
If people taking part in the test are males and females and want to know if they share one or both common parents, we suggest a siblings DNA test.
Are there any other uses for Y Chromosome DNA Testing?
Analysing the Y chromosome can help determine your patrilineal heritage. This test is one of the ancestry tests International Biosciences offers that will enable clients to discover their ancient lineage and origins as well as those of their forefathers. Click here for more information about our Paternal Lineage Testing?
Y chromosome testing is used in criminal forensic investigations and cases involving rapes. If a genetic sample is found at a crime scene, testing for the Y chromosome can establish whether there is any male DNA in the sample. Once the Y chromosome has been confirmed, it can be compared to the Y chromosome profiles of suspects to confirm a match.
Kwa mfano, kwa ajili ya majaribio ya DNA ya kiume, kuna muda wa siku 5-7 kutoka wakati wa kupokea sampuli katika maabara, na kwa ajili ya wanaume wanaohitaji kujua kama wana baba wa kibiolojia au mzazi wa baba wanaweza kuchagua mtihani wetu wa chromosome ya Y. Utafiti wa chromosome ya Y ni mtihani wa DNA wa kina ambao unafanya kazi kwa kulinganisha maelezo ya chromosome ya Y kwenye DNA ya washiriki wa mtihani. Utafiti wa Y ni mbadala mzuri wa mtihani wa utambulisho wa DNA katika kesi ambapo pande zinazohusika zinahitaji kujua ikiwa wanashiriki baba mmoja lakini hawawezi kujumuisha baba anayedaiwa katika mtihani. Kwa mfano, kwa ajili ya upimaji wa chromosome ya Y, kuna utaratibu wa kurudia-rudia wa Y-short tandem (STR) ambao ni utaratibu wa DNA unaorudiwa mara kwa mara. Chromosome ya Y hupatikana tu kwa wanaume na kwa kweli ni chromosome inayoamua jinsia. Jaribio la Y chromosome lina faida kadhaa kubwa - moja kuu kuwa usahihi wake na kuegemea (ni nadra sana kuwa na matokeo yasiyo na uhakika). Hii ni kwa sababu ya kiwango cha chini cha mabadiliko ya kromosomu ya Y. Chromosome hupitishwa bila kubadilika na ni bora kufuatilia mstari wa baba wa moja kwa moja. Katika jaribio hili, tunatathmini jumla ya alama 11 za maumbile zilizochukuliwa kutoka kwa sampuli za DNA zilizotolewa. Kufanana kabisa kwa kila alama ya urithi huonyesha kwamba wanaume waliochunguzwa wanashiriki ukoo wa baba mmoja. "Hata hivyo, matokeo ya mtihani hayawezi kukuambia asili halisi ya uhusiano kati ya watu waliochunguzwa: ikiwa wanaume wawili wanashiriki mstari huo wa baba, wanaweza kushiriki jamaa yeyote wa damu ya moja kwa moja, labda baba, babu au babu mkubwa.""" "Tunawaachia washiriki wa mtihani kufanya matokeo yao wenyewe kulingana na matokeo ya mtihani.""" Mfano wa Y chromosome inaweza kuchukuliwa kwa urahisi na kitanda chetu cha sampuli cha nyumbani ambacho tunakutumia mara tu tunapopokea malipo yako. Kwa hivyo, inahitajika sampuli mbili za mdomo kwa kila mtu ili kuchunguzwa. Maagizo na fomu za idhini hutolewa ndani ya kit. Kumbuka: Tunaweza tu kuhakikisha muda wa kawaida wa matokeo ya kugeuka wakati upimaji unafanyika tu kwa kutumia sampuli za swab ya mdomo. Kutumia sampuli ya forensic kwa ajili ya mtihani wako inaweza kusababisha ongezeko la muda wa kugeuka. Ni mtihani gani ninahitaji ikiwa washiriki ni wa kiume na wa kike? Ikiwa watu wanaoshiriki katika mtihani ni wanaume na wanawake na wanataka kujua ikiwa wanashiriki mzazi mmoja au wote wawili, tunapendekeza mtihani wa DNA wa ndugu. Je, kuna matumizi mengine ya upimaji wa DNA ya Kromosomu ya Y? Kuchanganua kromosomu ya Y kunaweza kukusaidia kuamua urithi wako wa ukoo wa baba. Mtihani huu ni moja ya vipimo vya ukoo ambavyo Biosciences ya Kimataifa inatoa ambayo itawawezesha wateja kugundua ukoo wao wa kale na asili pamoja na wale wa mababu zao. Bonyeza hapa kwa habari zaidi kuhusu majaribio yetu ya ukoo wa baba? Uchunguzi wa kromosomu ya Y hutumiwa katika uchunguzi wa jinai na kesi zinazohusisha ubakaji. Ikiwa sampuli ya chembe za urithi hupatikana kwenye eneo la uhalifu, kupima kromosomu ya Y kunaweza kuamua kama kuna DNA ya kiume katika sampuli hiyo. Baada ya chromosome ya Y kuthibitishwa, inaweza kulinganishwa na maelezo ya chromosome ya Y ya washukiwa ili kuthibitisha mechi.