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Can two parents that have a genetic disorder ever have a normal child?
Wiki User
∙ 12y ago
If the disease is caused by a recessive gene, the parents can have that gene and still be normal; only when the child inherits the gene from both parents does the recessive trait appear, causing a genetic disease.
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoDown's syndrome typically caused by a trisomy of chromosome 21. While additional aneuploidy of other chromesomes may exhibit similar symptoms to down's, all instances/ scenarios result in a lower fertility rate. However, while it is less likely for a person with down's syndrome to be fertile, the gametes they produce have about a 50% chance of also containing the extra copy or copies of the chromosome. While it's theoretically possible to have a normal child, it's unlikely.
Note: There have only been a handful of recorded instances of a male with down's successfully fathering a child. It's much more common for the female to have the condition and reproduce- but this still contains the increased risk of passing the condition on to the child.
Wiki User
∙ 12y agoYes.
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What are the causes of Noonan syndrome?
Noonan syndrome is caused by the mutation in a particular gene. It is a genetic disorder which means that the child which is born with this disorder, must have been in their parents.
How is a carrier different from a person who has genetic disorder?
A carrier means that you have the gene for the disorder, but because the gene is recessive (meaning that it only shows when you have two recessive genes) and you obviously have a dominant gene as well, you won't show the disorder. Someone who actually has the disorder has two recessive genes. D = dominant gene r = recessive gene Dr = carrier, no signs rD = carrier, no signs DD = not a carrier, no signs rr = has the disorder
Many inherited disorders of humans appear in children of parents who do not have the disorder how can you explain that the parents do not have the disorder but the child does?
The disorder is controlled by a recessive factor.
What is a genetic disorder that a child can inherit from his parent?
The diseases sickle cell anemia and thalassemia, both of which are inherited blood disorders caused by recessive genes. The child must get the recessive gene from both of their parents to have the disease. If the child only gets the recessive gene from one parent, they will be a healthy carrier.
Why is it that two normal parents could have a child with pku?
PKU, phenolketonuria, is a genetic disease caused by a recessive gene. So, a person with one normal and one faulty gene for this characteristic will not have the disease, you have to have two faulty genes to have the disease. If two people who each have one gene for PKU have a child, that child can inherit the gene from each parent and therefore will have two copies, causing the recessive trait to manifest.
How can a parent learn the risks of having a child with a genetic disorder?
A parent can learn the risks of having a child with a genetic disorder by looking at their own history. A genetic disorder is... da da da da! Genetic! so the traits of this disorder would be passed down through the generations. If both parents have family members with the trait or if the disorder is a dominant trait then there is a high chance of the disorder being passed down to the child. If the trait is recessive and only one parent has the genetic disorder in their family history then there are some pretty low chances of it being passed along to the child. Even if the trait is recessive, if both parents have the diorder in their history then there is about a 50% chance of the child having the disorder.
What happens when one has a genetic disorder?
it helps by teaching them so of the right things
What are the causes of Noonan syndrome?
Noonan syndrome is caused by the mutation in a particular gene. It is a genetic disorder which means that the child which is born with this disorder, must have been in their parents.
Which type of genetic disorder is Tay-sachs?
It is a recessive defect of a gene on chromosome 15. If both parents carry it and the child gets both copies, he will get this degenerative nerve disorder.
How is a carrier different from a person who has genetic disorder?
A carrier means that you have the gene for the disorder, but because the gene is recessive (meaning that it only shows when you have two recessive genes) and you obviously have a dominant gene as well, you won't show the disorder. Someone who actually has the disorder has two recessive genes. D = dominant gene r = recessive gene Dr = carrier, no signs rD = carrier, no signs DD = not a carrier, no signs rr = has the disorder
How can a pedigree be 100 percent accurate about what the genotypes of an offspring will be?
It cannot (unless the parents were homozygous), but it can help predict the odds of having a child with a genetic disorder.
2 A child is diagnosed with a rare genetic disease Neither parent has the disease How might the child have inherited the disorder?
Both parents are carriers of the recessive gene and if the child inherits that gene from both mother and father the child will have the disease even though the parents don't.
What are Professionals who help couples understand their chances of having a child with a particular genetic disorder are called?
A professional who helps people understand their chances of having a child with a genetic disorder is called a geneticist.
Many inherited disorders of humans appear in children of parents who do not have the disorder how can you explain that the parents do not have the disorder but the child does?
The disorder is controlled by a recessive factor.
What is the probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder?
75%. Explanation: if both parents are carriers than their Gametes would be Dd x Dd, resulting in DD (1/4), Dd (2/4), and dd(1/4), meaning that there is a 25% chance that they will have a child that has the disorder. DD = A normal child that lacks the recessive gene, therefore not a carrier Dd = A normal child that carries the recessive gene dd = A child with the disorder + carries the gene, hence the child's future offspring will carry it as well. Source: Self/Basic Punnet Square
Why would a person who receives genetic therapy for a disorder still be able to pass on the disorder to his or her children?
No, because this genetic disorder occurs because the parents are heterozygous, they don't show any symptoms. However, if each pqarent passes the recessive allele to the child, the child inherits both recessive alleles and will have a recssive genetic disorder, so it doesnt matter if you have a gene transfer because, the new gene is not yours, so you children may have it. xoxo
Is it possible for 2 parents with down syndrome to produce a child with no non-disjunction disorder please explain why?
Since Down Syndrome is not genetic and is a trisomy, dominant and recessive genes do not play a role and it is possible for two down syndrome parents to have a child without down syndrome.
