Question
Alleles for the A and B blood cell antigens are codominant. The condition where no antigens are present on the blood cells (type O blood) is a recessive trait. Which set of parents can most likely produce a child with type O blood? (SC.912.L.16.1)
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1 point
one parent with type AB blood, and the other parent with type A blood
one parent with type AB blood and the other parent with type O blood
one parent with heterozygous type A blood, and the other parent with type O blood
one parent with homozygous type A blood, and the other parent with homozygous type B blood
Answers
GPT-4o mini
To determine which set of parents can most likely produce a child with type O blood, we need to consider the genetic traits associated with the blood types:
- Type A blood can be either homozygous (AA) or heterozygous (AO).
- Type B blood can be either homozygous (BB) or heterozygous (BO).
- Type AB blood has the genotype (AB).
- Type O blood has the genotype (oo), which is recessive.
Now, let's analyze the given options:
1. One parent with type AB blood (AB) and the other parent with type A blood (could be AA or AO):
- Possible combinations for children: AB, AA, AO (no chance for type O).
2. One parent with type AB blood (AB) and the other parent with type O blood (oo):
- Possible combinations for children: AO (type A) and BO (type B, no chance for type O).
3. One parent with heterozygous type A blood (AO) and the other parent with type O blood (oo):
- Possible combinations for children: AO (type A) and oo (type O).
- This option **can** produce a child with type O blood.
4. One parent with homozygous type A blood (AA) and the other parent with homozygous type B blood (BB):
- Possible combinations for children: AB (no chance for type O).
The only set of parents that can produce a child with type O blood is:
**One parent with heterozygous type A blood, and the other parent with type O blood.**
- Type A blood can be either homozygous (AA) or heterozygous (AO).
- Type B blood can be either homozygous (BB) or heterozygous (BO).
- Type AB blood has the genotype (AB).
- Type O blood has the genotype (oo), which is recessive.
Now, let's analyze the given options:
1. One parent with type AB blood (AB) and the other parent with type A blood (could be AA or AO):
- Possible combinations for children: AB, AA, AO (no chance for type O).
2. One parent with type AB blood (AB) and the other parent with type O blood (oo):
- Possible combinations for children: AO (type A) and BO (type B, no chance for type O).
3. One parent with heterozygous type A blood (AO) and the other parent with type O blood (oo):
- Possible combinations for children: AO (type A) and oo (type O).
- This option **can** produce a child with type O blood.
4. One parent with homozygous type A blood (AA) and the other parent with homozygous type B blood (BB):
- Possible combinations for children: AB (no chance for type O).
The only set of parents that can produce a child with type O blood is:
**One parent with heterozygous type A blood, and the other parent with type O blood.**