Question

ABO BLOOD TYPE The ABO blood groups in humans are determined by multiple alleles. A single gene can exist in any of three allelic forms: 14, Bor i. This inheritance of the ABO blood type displays codominance as well as complete dominance. The two codominant genes A and B code for production of antigen A and antigen B on the surface of red blood cells, and are both completely dominant to the recessive allele i. The chart below shows the four blood type phenotypes and genotypes. Blood Type O A Antigens Present Neither A nor B A B Both A and B Genotype ii JAIA or i BB or Bi ALB B AB 4

Answer 1

are are Blood group by and where both the There four typex of Blood Groups present en Hunnan which A, B, AB, o is decided the Antigen present on the RBC the antibodies present in Plasma. AB blood group is an example of w dominance expressed their phenotype resulti in iting blood group AB. Blood Group | Antigen / Antibody Genotype | IA I IB IB IIBI° AB AB IoIo ori alleles a А. А I AIA B B a IA IB ab 0 AB blood group has no antibodies hence can receive blood from any person (Universal recipient) Universal donar (No antigen present) o

14 must has the one mother and the If the blood type of the child is o then he/she genotype Iº I° The child receivex allele genotype from the from father condition guven f .parent one Blood type A that genotype of parent will be either IA IA or IA 1º. one has then the of the the Blood type of other parent is 8, then that parent will be either IB IB IIBIO genotype of that 0 Blood type then it means received I allele this can infer that from both we 카 the child has that the child parente from the parent must for for only then their have the heterozygous allele their respective blood type child can have O blood group.

Parent (2) Parent (1) II Il 1° IAL Blood AB IA I I I° Blood Type type Type o B 1 IAI" IPIO IBIA Blood Type A 1° | I^1° | I° 1° Blood IBIO group o Blood Type B Hence, the given condition is possible. The couple to a child that will can give 'o' blood berth have group