how to determine the possible gametes for a genotyope? RrTt?? Please help and it would mean a lot if you knew how to find a childs blood type based off the parents.it would mean so much to me if...

how to determine the possible gametes for a genotyope? RrTt??

Please help and it would mean a lot if you knew how to find a childs blood type based off the parents.

it would mean so much to me if you could answer both.

Expert Answers
trophyhunter1 eNotes educator| Certified Educator

The first part of the question has to do with the Principle of Segregation. When gametes are produced, members of a gene pair separate into different gametes. Therefore, you must separate the genes Rr and the genes Tt when producing the gametes. This individual is a dihybrid(heterozygous for two traits). Therefore, you must place one member of each gene pair into a gamete. The possible combinations of r's and t's are--RT, Rt, rT, rt. Those are the four possible gametes this individual can produce. For the second part of the question, blood type is inherited in the following manner. Allele A and B are co-dominant and allele 0 is recessive to both. Possible genetic combinations include AA and A0 which produce an individual with type A blood, BB and BO which produce an individual with type B blood, AB which produces an individual with type AB and 00 which is the only combination that produces an individual with the recessive type O.