Gallagher says competition is biological, hardwired into humans in order to ensure the survival of the species.

FORBES: Power Women And Their Power Nemeses

And in order to have any biological activity, if the gene fragment is somehow turned into a protein it would have to get into our own cells, and it does not have the capability to do that.

FORBES: Why GMO Food Opponents Shouldn't Freak Out About Cauliflower Virus DNA

He ruled that, in this case, it was "appropriate" for the biological fathers to apply for a contact order, which would set out when they could see the child such as on certain weekends or during school holidays.

BBC: Sperm donors can seek access to kids

Advocates argue that in order to truly understand how basic biological processes work, they'll need to compare and contrast how different stem cell lines function.

BBC: Embryonic stem cells can be turned into any kind of cell

In order for the body to operate efficiently, biological substances must bind to or pass chemical messages to each other to start and stop working.

WSJ: Genes May Link Disparate Diseases

Marjorie Wallace, chief executive of mental health charity Sane, said the findings "highlight the need to understand the genetic and biological factors of these life-changing conditions, in order that more effective treatments and therapies may be found".

BBC: Five psychiatric disorders 'linked'