Question
The blood types for three babies and their possible parents are shown in the diagram. Baby L: Type AB Baby M: Type B Baby N: Type O & Parent & Blood Type multirow(2)(*)( Couple 1) & Mom 1 & AB cline ( 2 - 3 ) & Dad 1 & 0 multirow(2)(*)( Couple 2) & Mom 2 & A cline ( 2 - 3 ) & Dad 2 & B multirow(2)(*)( Couple 3) & Mom 3 & 0 cline ( 2 - 3 ) & Dad 3 & 0 Which babies are matched with the correct parent couples? Baby L: Couple 1; Baby M: Couple 2; Baby N: Couple 3 Baby L: Couple 3; Baby M: Couple 2; Baby N: Couple 1 Baby L: Couple 2; Baby M: Couple 1; Baby N: Couple 3 Baby L: Couple 1; Baby M: Couple 3; Baby N: Couple 2
Answer
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(311 Votes)
Rebecca
Master · Tutor for 5 years
Answer
# ExplanationTo determine which babies are matched with the correct parent couples based on their blood types, we need to understand the inheritance patterns of blood types. The ABO blood type system is determined by the presence of antigens on the surface of red blood cells, which are inherited from the parents. Here are the possible combinations:1. **Type A**: Can be
or
2. **Type B**: Can be
or
3. **Type AB**: Must be
4. **Type O**: Must be
Given the blood types of the babies and the parents, we can deduce the possible matches.### Baby L: Type
- **Couple 1**: Mom 1 (AB) and Dad 1 (O) - Possible offspring:
or
(since Dad 1 can only contribute
) - Cannot produce
child because Dad 1 can only contribute
- **Couple 2**: Mom 2 (A) and Dad 2 (B) - Possible offspring:
,
,
, or
- Can produce
child- **Couple 3**: Mom 3 (O) and Dad 3 (O) - Possible offspring:
- Cannot produce
childThus, Baby L must belong to **Couple 2**.### Baby M: Type
- **Couple 1**: Mom 1 (AB) and Dad 1 (O) - Possible offspring:
or
- Can produce
child- **Couple 2**: Mom 2 (A) and Dad 2 (B) - Possible offspring:
,
,
, or
- Can produce
child- **Couple 3**: Mom 3 (O) and Dad 3 (O) - Possible offspring:
- Cannot produce
childThus, Baby M could belong to either **Couple 1** or **Couple 2**. However, since Baby L is already matched with Couple 2, Baby M must belong to **Couple 1**.### Baby N: Type
- **Couple 1**: Mom 1 (AB) and Dad 1 (O) - Possible offspring:
or
- Cannot produce
child- **Couple 2**: Mom 2 (A) and Dad 2 (B) - Possible offspring:
,
,
, or
- Can produce
child- **Couple 3**: Mom 3 (O) and Dad 3 (O) - Possible offspring:
- Can produce
childThus, Baby N must belong to **Couple 3**.# AnswerBaby L: Couple 2; Baby M: Couple 1; Baby N: Couple 3