Adnexal skin tumors are inherited as:- A recessive trait, because it is a defect.
- A dominant trait, because it causes death.
- A recessive trait, because a person with the gene may not have the disease.
- A dominant trait, because a person with one adnexal allele of the gene always has the disease.
- Suppose one parent has two gene alleles (versions of the gene) that cause adnexal skin tumors, but the other parent has only one adnexal allele. What is the probability that their child has the disease?
- 100% because the one parent will always pass on the disease gene.
- 50% because the child will inherit either the healthy or the diseased genes.
- 25% because the child must inherit both disease genes.
- 0% because the child can only inherit one disease gene.
- Suppose First Officer Spock has one genes for Vulcan ears, a dominant trait, but Spock's wife has none. What is the probability that their child will have Vulcan ears?
- 50% because the child could inherit Vulcan ears from the parent who has them.
- 100% because the child will always inherit the trait from the parent who has dominant trait.
- 25% because the child would have to inherit two genes for Vulcan ears in order to exhibit it.
- 0% because the child would have to inherit two genes for Vulcan ears in order to exhibit the trait, and only one parent has the trait.
- Suppose a child is born to two parents who both have sickle cell anemia, which is a recessive trait. What is the probability that the child will have the disease?
- 50% because either parent could pass on the gene.
- 100% because both parents pass on the sickle cell gene.
- 25% because both parents must pass on the gene.
- 0% because neither parent will pass on the gene.
- Suppose two parents have malaria protection, a dominant trait, via one copy of the sickle cell allele (but no sickle cell anemia, which requires two alleles). What is the probability that their child will have malaria protection but NOT sickle cell anemia?`
- 100% because both parents will pass on malaria protection but neither will pass on the disease.
- 0% because both parents will pass on the gene, and the child will have sickle cell anemia.
- 25% because both parents must pass on the sickle cell gene.
- 50% because the child must receive exactly one sickle-cell gene.
- Suppose one parent has double muscle super strength, a recessive trait, but the other is only a carrier. What is the probability that their child will have the trait?
- 100% because both parents have a gene for the trait.
- 50% because the child could inherit either one allele or two alleles for the trait.
- 25% because the child must inherit the allele from both parents in order to display the trait.
- 0% because the child will only inherit one gene for the trait.
- Suppose a child is born to two parents who are both carriers of Klingon forehead, which is a recessive trait. What is the probability that the child will have a Klingon forehead?
- 100% because both parents have the Klingon forehead gene.
- 50% because the child can inherit the Klingon forehead gene from either parent.
- 25% because the child must inherit the gene for the trait from both parents.
- 0% because neither parent actually has a Klingon forehead.
- Wilson's disease is a _.
- Recessive trait because it is a defect.
- Dominant trait because it causes death.
- Recessive trait because a person with only one allele of the gene does not have the disease.
- Dominant trait because a person with the gene always gets the disease.
- Suppose the person at the bottom of the above pedigree marries someone who has Wilson's disease. What is the probability that their child will have Wilson's disease?
- 100% because both parents have the disease and will pass it on.
- 50% because each parent either will or will not pass on the disease.
- 25% because both parents must pass on the disease gene.
- 0% because neither parent will pass on the disease gene.
- Suppose a man and a woman who are both carriers of Wilson's disease have a baby. What is the probability that the baby will have Wilson's disease?
- 100% because both parents have disease genes.
- 50% because either parent could pass on the disease gene.
- 25% because both parents would have to pass on the disease gene.
- 0% because neither parent actually has the disease.