Question
F) A parent who is homozygous dominant (AA) for the MOGS-CDG doesn`t express that trait. If a
parent who does not have the MOGS-CDG (AA) disorder has a child with a parent who has
MOGS-CDG (aa), which of the following statements are true? (1 point)
There is a 0% chance that the child will have MOGS-CDG.
There is a 75% chance that the child will show the dominant phenotype.
There is a 25% chance that the child will have the Aa genotype
There is a 100% chance that the child will inherit an allele for MOGS-CDG.
parent who does not have the MOGS-CDG (AA) disorder has a child with a parent who has
MOGS-CDG (aa), which of the following statements are true? (1 point)
There is a 0% chance that the child will have MOGS-CDG.
There is a 75% chance that the child will show the dominant phenotype.
There is a 25% chance that the child will have the Aa genotype
There is a 100% chance that the child will inherit an allele for MOGS-CDG.
Answers
GPT-4o mini
To analyze the genetic situation described:
1. The parent who does not have the MOGS-CDG disorder is homozygous dominant (AA).
2. The parent who has MOGS-CDG is homozygous recessive (aa).
When these two parents mate, the possible combinations of alleles for their children can be determined using a Punnett square:
- From the AA parent, the only allele passed on is A.
- From the aa parent, the only allele passed on is a.
The possible genotypes for the offspring would then be:
- 100% chance of Aa
Now let's evaluate the statements provided:
1. **There is a 0% chance that the child will have MOGS-CDG.**
**True.** The child will inherit one dominant allele (A) from the AA parent, so they cannot express the MOGS-CDG trait, which is recessive (aa).
2. **There is a 75% chance that the child will show the dominant phenotype.**
**False.** There is a 100% chance that the child will show the dominant phenotype (because all children will have the Aa genotype, which expresses the dominant trait).
3. **There is a 25% chance that the child will have the Aa genotype.**
**False.** There is a 100% chance that the child will have the Aa genotype.
4. **There is a 100% chance that the child will inherit an allele for MOGS-CDG.**
**False.** The child will inherit the dominant allele (A) from the AA parent, but will receive the recessive (a) from the aa parent. Therefore, the child will not inherit an allele that expresses the MOGS-CDG trait.
So, to summarize:
- **True:** There is a 0% chance that the child will have MOGS-CDG.
- All other statements (2, 3, and 4) are **false.**
1. The parent who does not have the MOGS-CDG disorder is homozygous dominant (AA).
2. The parent who has MOGS-CDG is homozygous recessive (aa).
When these two parents mate, the possible combinations of alleles for their children can be determined using a Punnett square:
- From the AA parent, the only allele passed on is A.
- From the aa parent, the only allele passed on is a.
The possible genotypes for the offspring would then be:
- 100% chance of Aa
Now let's evaluate the statements provided:
1. **There is a 0% chance that the child will have MOGS-CDG.**
**True.** The child will inherit one dominant allele (A) from the AA parent, so they cannot express the MOGS-CDG trait, which is recessive (aa).
2. **There is a 75% chance that the child will show the dominant phenotype.**
**False.** There is a 100% chance that the child will show the dominant phenotype (because all children will have the Aa genotype, which expresses the dominant trait).
3. **There is a 25% chance that the child will have the Aa genotype.**
**False.** There is a 100% chance that the child will have the Aa genotype.
4. **There is a 100% chance that the child will inherit an allele for MOGS-CDG.**
**False.** The child will inherit the dominant allele (A) from the AA parent, but will receive the recessive (a) from the aa parent. Therefore, the child will not inherit an allele that expresses the MOGS-CDG trait.
So, to summarize:
- **True:** There is a 0% chance that the child will have MOGS-CDG.
- All other statements (2, 3, and 4) are **false.**