In humans there are three alleles at the abo locus causing blood types a, b, ab, o. how many genotypic and phenotypic combinations are possible in the offspring of a brown-eyed, red-haired, taster man with ab blood group (bb rr tt ab) married to a blue-eyed, non-red haired, taster with type a blood (bb rr tt ao) woman?

Sarah and john are having a discussion on genetic diversity. sarah believes that it happen over a long period of time. john it happens immediately. who is correct? a. sarah is correct because genetic diversity occurs over a long period of time. b. john is correct because genetic diversity occurs immediately. c. both are correct because genetic variation can occur or long period of time. d. neither are correct because genetic diversity occurs over any period of time