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What causes huningtons disease?
Huntingtons disease is a genetic/inherited diesease. It is caused by a faulty allele (a dominant one), which can be inherited by parents. Spontanoius mutations may also occur which would cause the faulty gene and therefore huntingtons disorder.
What is HFEA?
HFEA is Human Fertilization and Embryology Authority. It means that a sperm cell and an egg cell are fertilized in a laboratory. Then, alleles with a certain disorder or disease are removed, and chromosomes from somebody that doesn't have the disease are used. Copies of this allele are made. The normal alleles are then put in place of the faulty ones of that fertilized egg.
Is Huntingtons disease a hereditary bleeding disorder passed from mother to child?
No. While it is a hereditary disease it is not at all a bleeding disorder, nor is it only passed by the mother. It is a degenerative, neuropsychiatric disease that can be passed by either the mother or father. If the parent has it, the child's chance of inheritance is of the faulty gene is 50%.
How is samoyed hereditary disease carried?
Samoyed Hereditary Glomerulopathy is caused by an X-linked dominant faulty allele, and only severely affects male dogs (renal failure). Females who carry the gene can develop mild symptoms, but these are not fatal. When a female carrier is bred with a healthy male, the offspring have a 50% chance of having the faulty allele.
Does a dominant allele mask a ressessive allele?
In diploid organisms (those with two copies of each gene carried on separate chromosomes), one of the copies of a given gene may differ from the other copy of the same gene on the twin chromosome. In some cases one version of the gene (the dominant allele) has the effect of 'masking' the activity of the other (the recessive allele); that is, the presence of the dominant allele negates the effect of the recessive allele on the organism's phenotype. There are many mechanisms which can cause this phenomena, and it depends on the particular genes involved, but a simple model is one where the recessive allele is a biochemically inactive version of the dominant allele. In this case the dominant allele would mask the effect of the recessive allele by providing an active version of the gene. The dominant phenotype would be the one which shows the downstream effects of this activity, and the recessive phenotype one which shows the downstream effects of a lack of activity. The dominant allele is said to 'mask' the recessive allele because only one copy is required to result in an elimination of the recessive phenotype, whereas all copies of the gene must be the recessive allele to result in the recessive phenotype.
How does hemophilia progress?
Hemophilia is a recessive allele condition. Men can get hemophilia alot easier than women as the allele is found on the XY Chomosome pair. With men. they do not have the extra "tail" on the Y chromosome compared to the XX with a female. If the person has the recessive allele on the X chromosome and this person is male, they will be a hemophiliac as they do not have a 'pair' allele which could be dominant to stop the condition expressing itself. On a female, if there is a recessive (hemophilia) allele on one of the X chromosomes but on the other is a Dominant (normal) allele then she will be a carrier of the faulty gene but will not suffer from the condition herself. If the female have a recessive (faulty) gene on each of the XX chromosomes, then she will be a sufferer of the disease.
Which inherited disease is caused by a faulty ion channel?
Cystic Fibrosis
Which of the following is the first step in gene therapy?
Identifying the faulty Gene. Identifying the faulty Gene that causes the disease.
Which inherited disease is caused by faulty ion channels?
Cystic fibrosis is one.
Is huntingston disease x or y chromosome?
Huntington's disease is a genetic disorder caused by a mutation in the HTT gene located on chromosome 4, not on the X or Y chromosomes. This mutation leads to the production of a faulty form of the protein huntingtin, which causes damage to nerve cells in the brain.
A child is diagnosed with a rare genetic disease neither parent has this disease how was the disorder inherited?
Recessive is carried by both parentsIn simplest terms, the disease is recessive, so two copies of the gene that cause it are necessary. Both parents have only one copy of the gene, so, they don't have it, but are carriers. A child gets half his or her genes from each parent. If the child gets the bad gene from each parent, the child will have the disease. There is a 25% chance of this happening with every child these parents have.
How can you get cystic fibrosis?
For a baby to be born with Cystic Fibrosis, both parents must be carriers of the faulty CF gene. Where both parents carry the faulty gene, each child has a one in four chance of having CF, a two in four chance of being a carrier and a one in four chance of not having any CF genes.
