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Sample Genetics Problems in inheritance

1. A child wonders if she is adopted and hence compares her blood type to those of her parents. Her father is type AB and her mother is type O. What blood type of the child would indicate that she might have been adopted?

2. Color blindness is a sex linked recessive trait in humans. The only member of Judy's family who is color blind is her brother Jim. . What is Jim's Genotype? The father's genotype? The mothers genotype? What is Judy's genotype if she later has color-blind son?

3. A woman goes to court to sue a man she believes to be her father of her child. Blood types are determined for the woman, man, and the child:

Woman: blood type AB
Man: blood type O
Child: blood type AB

Is it likely that this man fathered the woman's child?

Thanks please can you provide some sort of punnet square.

Solution Preview

1. A child wonders if she is adopted and hence compares her blood type to those of her parents. Her father is type AB and her mother is type O. What blood type of the child would indicate that she might have been adopted?

The cross of the two parents is as follows:

IA IB
i IA i IB i
i IA i IB i

So, the two parents, based on the blood types given, could only have ...

Solution Summary

In this solution, I discuss the following questions:

1. A child wonders if she is adopted and hence compares her blood type to those of her parents. Her father is type AB and her mother is type O. What blood type of the child would indicate that she might have been adopted?

2. Color blindness is a sex linked recessive trait in humans. The only member of Judy's family who is color blind is her brother Jim. . What is Jim's Genotype? The father's genotype? The mothers genotype? What is Judy's genotype if she later has color-blind son?

3. A woman goes to court to sue a man she believes to be her father of her child. Blood types are determined for the woman, man, and the child:

Woman: blood type AB
Man: blood type O
Child: blood type AB

Is it likely that this man fathered the woman's child?

$2.19