Question

How we identify a blood group is positive or negative?❣️❣️❣️❣️❣️

Answer 1

A negative blood type parent must have two negative copies, which causes themto lack the Rh factor. A positive blood type parent can have two positive copies OR one positive copy and one negativecopy.

Answer 2

positive blood consists of the Rh factor on the surface of the red blood cells whereas negative blood does not contain the Rh factor on the surface of the red blood cells. The two alleles that determine the RH blood group are the allele D and d. The allele D is the dominant allele and the allele d is the recessive allele. The genotypes, DD and Dd, produce the Rh factor on the surface of the red blood cells. The genotype dd is unable to produce the Rh factor on the surface of the red blood cell.