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There is no clear evidence regarding how Mary disappeared, whether she left on her own or was abducted.
The baby's DNA is majorly from the two parents and - about 37 genes - from a third, a donor woman.
Thirty-year-old Sunitha, a mother of two, had vanished nine years ago in March 2013, on the day her husband had beaten her unconscious and poured kerosene over her.
There was a burnt woman's body in the septic tank but the investigating officer was not able to produce any scientific evidence that would categorically establish that the body was Sunitha's.
Paabo won the prize for having sequenced the genomes of Neanderthals and Denisovans, and for the fact that these discoveries have resulted in novel insights into human evolution.
The foster parents had lost their mental peace from Day 1 when they came to know about the controversy in Kerala over the parenthood of the boy.
A buccal or cheek swab is taken for the DNA test.
The Vanchiyoor Family Court said this while considering the controversial adoption case where a mother had accused her parents of illegally handing over her baby for adoption.
A youngster, who is a class 12 student, and his parents on Sunday sought a detailed investigation to identify the culprits involved in the crime.
The study, published in the journal Cell Reports, showed there was no evidence of Covid-19 - or the Pfizer or AstraZeneca vaccines - entering DNA.