Blood groups in human beings are controlled by……..
a) 4 alleles in which A is dominant
b) 3 alleles in which A and B are co-dominant and i is recessive
c) 3 alleles in which none is dominant
d) 3 alleles in which A is recessive
Genes located on same locus but having different expressions are………..
a) multiple alleles
b) oncogenes
c) polygenes
d) co-dominance
