Some characteristics are controlled by a single gene, such as fur in animals and red-green colour blindness in humans. Each gene might have different forms, and these are called alleles. The diagram ...

A dominant allele is always expressed, even if one copy is present. Dominant alleles are represented by a capital letter, for example you could use a B. The allele for brown eyes, B, is dominant. You ...

Angelina Jolie and Brad Pitt … in spring 2013, Jolie had a double mastectomy after finding out that she carries the breast cancer gene. Photograph: Rex Dr Sharon Moalem recently diagnosed a mother ...

Simply sign up to the Science myFT Digest -- delivered directly to your inbox. New gene drive technology that could revolutionise biology research has been demonstrated for the first time in mammals, ...