Question

the gene for brown coloured hai is recessive over gene for black coloured hair ​

Answer 1

Answer. Let, the gene for red hair colour (rr) is recessive and the gene for black hair colour (BB) is dominant. According to the flow chart the hair colour of a child will be black (Br) if he inherits a gene for red colour hair (rr) from his mother and a gene for black colour hair (BB) from his father.