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Doctor insights on: Recessive Allele Cause

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Does a dominant or recessive allele cause severe combined immunodeficiency?

Does a dominant or recessive allele cause severe combined immunodeficiency?

It's complicated: In short, you ask a good question, but the answer is much more complicated. There are different types of severe combined immunodeficiency (scid). Some are autosomal, and some are x-linked. Many require homozygous changes, others can occur with genetic compounds. None are "autosomal dominant". ...Read more

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Cystic fibrosis disease is carried by a recessive allele on which gene?

Cystic fibrosis disease is carried by a recessive allele on which gene?

CFTR: Cystic fibrosis is caused by a mutation of the cftr gene, or cystic fibrosis transmembrane regulator, on chromosome 7. Cftr works as a chloride ion channel which helps to regulate chloride and sodium movement in your lungs and sweat ducts. ...Read more

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Is dwarfism caused by a recessive or dominant allele?

It depends: It depends on what one means by dwarfism: a short stature in general (this depends on your ethnic origin as well) or a genetic syndrome which involves extremely short stature as part of the clinical picture. Some of them are dominant = inherited from a parent or rose spontaneously (de novo) in the individual. Some of them are recessive (=parents unaffected carriers of the condition). ...Read more

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What exactly is the cause of lou gehrig's disease: a dominant allele or a recessive one?

What exactly is the cause of lou gehrig's disease: a dominant allele or a recessive one?

Neither: Familial ALS is relatively uncommon, especially in view of fact that this is a rather rare disease. Over 90% are sporadic, without clearcut genetic answers. ...Read more

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Can you tell me in the ABO blood group, which allele is considered recessive?

Can you tell me in the ABO blood group, which allele is considered recessive?

ABO blood type: In this system of red cell antigens, O is considered to be recessive. Someone with type O blood would have two O alleles. People with type A blood can have two A alleles or one A allele and one O allele. Same with blood type B. This makes O the recessive and A and B are dominant. ...Read more

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Scientists test for alleles that cause human genetic disorders by what method?

Scientists test for alleles that cause human genetic disorders by what method?

Molecular Methods: Identifying alleles associated with disease can be done by numerous different methods depending on the type of genetic alteration. Gene sequencing is often the gold standard. However, for disease caused by deletion or insertion of a segment of DNA, a technique called Fluoresense In Situ Hybridization is used. For detection of single base pair changes numerous different techniques can be used ...Read more

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Is it possible for a person to have two dominate alleles for huntingtons?

Is it possible for a person to have two dominate alleles for huntingtons?

Yes: It's very unusual for someone to inherit two mutations - one for each of their huntington disease genes, but it's possible. A person with homozygosity will develop the signs and symptoms of hd at about the same age, on average, as someone with just one mutation. However, the disease progresses more rapidly. Here is a link to some research: http://www.Ncbi.Nlm.Nih.Gov/pubmed/12615650. ...Read more