PART 2-Blood Types (6 marks) Three bables were recently mixed up at the hospital
ID: 216900 • Letter: P
Question
PART 2-Blood Types (6 marks) Three bables were recently mixed up at the hospital. Whoops Can you help the parents find the correct baby, based on their blood types? Use Punnett squares to show how each couple could have produced their baby. Use the correct symbols for the blood type alleles. Hint start with Zack and Zoe's square. (6 marks -2 per baby!) Parents | Couple #2 Joe Jane Mark Mary Zack Couple#3 I Couple #1 | Babies Laura Lola Lita O ?AB Blood Types Blood 1. Joe and Jane's Baby is 2. Mark and Mary's Baby is 3. Zack and Zoe's Baby is: I - A allele BB allele i O alleleExplanation / Answer
Human blood group system follows simple pattern on inheritance where allele A and B are co-dominant and both A and B are completely dominant over allele O. Thus, a person having blood type A can have genotype AA or AO. This holds true for blood type B as well. Finally, those having blood type O have genotype OO only.
Thus, it can be seen here that the parents Zack and Zoe have blood types AB and O, respectively, thus there genotypes would be AB and OO. Their Punnett square can be created as below:
Thus, this suggests that the possible phenotypes of this couple's child can be either A or B only. This indicates that Laura is this couple's child.
Considering that the other two kids have blood types O and AB, it can be understood that there parents must have atleast one O allele and A/B alleles respectively.
Looking at the blood types of couple Joe and Jane, they have types A and B respectively while Mark and Mary have both blood type A only. Thus, Mark and Mary cannot have a child with blood type AB thus their Punnett square will be given by:
Mark and Mary:
Thus, their child will have type A or O only. Thus, the kid Lola belongs to Mary and Mark.
Finally, the couple Joe and Jane have blood types A and B thus their genotypes can be either AA, BB or AO, BO. In final case, considering their genotypes to be AA and BB, the Punnett square can be formulated as:
Thus, their child would be AB blood type and the child Lita belongs to this couple.
A B O AO BO O AO BORelated Questions
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