chimera phenomenon

Typically, 2,999 out of 3,000 calico cats are female. Male calico cats are extremely rare, and are mutated...

When you take any two cells in your body for genetic testing, they are more likely to have identical DNA.

The story begins when the American couple not long after giving birth to their son with the method of IVF discovered that the boy has a blood group unlike both parents.

The 34-year-old American man actually with his wife gave birth to a son. But DNA testing showed that he was not his biological father.