Question

QUESTION 25 "The gene for ABO blood typing has three possible alleles in human populations for A-antigen, B-antigen, and no antigen on red blood cells, respectively. There being individuals with both A and B antigens on their red blood cells is evidence that this gene inheritance is by" incomplete dominance plelotropy epistasis codominance multiple alleles

Answer 1

Pleiotropa Oh o we have so for seen the effed of a gene single phenotype or traid. are however where a single gene can exhibit mutipal phenotypic expression. An example is Bickle tell themia and phenylketonuria there Sickle cell Anemia А. group of disorder that cause red blood cell become mishopped and breakdown. red blood Sickle 8 sickle cell disease an inherited group of disorder. blood cohvert ino sickle shople. Cell RBC block & flow, causing pain. Sickle cell Anemia is a pleiotropic beacause expression of single motated gene prodere consequences through tout the body. sickle cell Anemia is caused by mutation in the haemoglobin B gene found Haemoglobin tranport Oxygen from the lung to other parts of the body humerous eh chromosome 11. sosok

Codominonce in ABO blood group are the the The antigen Qure Codominace means that neither allele can work the expression the other allele. An example in human would be the ABO blood group. Where allele A and allele B both expressed. ABO blood group is a good example of codominance. Heterozygous T/IB individuals have blood group AB Antigen Al Product of the alleless A) and B ( Product of the IB alleled codominant. Codominance follows the basic Mendelian principals. An individuals who expressed blood group-o. must Process ili genotype. the parents of this person. Could be both olilixixi) or as (pli x 1 h/;) Produce one fourth (ifj Progety) 8 (Blix I/:) could be H and could be B (IT) (10) Each parent would have to be either homozygous i or heterozygous, with i co oj of the two alleles to OV che one Ohe Ans C-Codominance