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Doctor insights on: Recessive Dominant

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Can you tell me if the disorder, hypercholesterolemia, a recessive, dominant, coodominant, sex-linked, or chromosomal disorder?

Can you tell me if the disorder, hypercholesterolemia, a recessive, dominant, coodominant, sex-linked, or chromosomal disorder?

No: This is simplistic and if your were asked this question by a teacher, you need to straighten things out. Type ii hypercholesterolemia caused by defective LDL receptors is a semi-dominant with one dose being bad and two being much worse. Other forms have other inheritance, but most high cholesterol is polygenic (several loci) with an environmental and lifestyle influence as well. ...Read more

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Is there a test to find out which combination of eye colour genes (recessive/dominant/colours) a person carries?

Is there a test to find out which combination of eye colour genes (recessive/dominant/colours) a person carries?

Not yet: You will have to rely on the geneological chart of eye color in your family to get close to this. At the moment, the isolation of the eye color genes is not high enough on the need chart to be worthwhile - diseases come first. ...Read more

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Is Down syndrome sex linked/recessive/or dominant?

Is Down syndrome sex linked/recessive/or dominant?

None of the above: Down syndrome happens when an extra 21 chromosome is present in all the cells of the body. It happens before conception when the donor egg fails to shed one of its 21 chromosomes in the formation of the egg; the male 21 joins the female pair & creates an embryo with 3 number 21's. It has nothing to do with traits or mutations in the gene code. ...Read more

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Is there a particular chromosome XYY Syndrome is located? and is it recessive or dominant?

Is there a particular chromosome XYY Syndrome is located? and is it recessive or dominant?

No: XYY syndrome is neither autosomal dominant or recessive. See a geneticist about inheritance patterns. It is often causes by chromosome nondysjunction (lack of separation). There is not a particular chromosome but the sex chromosomes are called X and Y. Females typically are XX and Males XY. XYY is causes by a Y chromosome separation issue. XYY individuals are usually normal males ...Read more

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Is XYY syndrome- Sex-linked-yes or no; particular chromosome; recessive or dominant?

Is XYY syndrome-                                 
      Sex-linked-yes or no; particular chromosome; recessive or dominant?

Klinefelter Syndrome: Hi, Klinefelter Syndrome, or XYY syndrome is a syndrome where males have an extra Y chromosome, which makes them 47 XYY rather than 46 XY. It is not a sex-linked, autosomal dominant, nor autosomal recessive disorder. The inclusion of the extra Y chromosome is thought to be a random event, even in cases of 47 XYY mosaicism. Follow this link: http://ghr.nlm.nih.gov/condition/47xyy-syndrome ...Read more

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What is recessive vs dominant heredity?

What is recessive vs dominant heredity?

Mendellian genetics: In mendellian genetics, you inherit half your genes from your mom & half from your dad. Each of these genes can then be either recessive or dominant. Dominant genes only require one copy from either mom or dad to make trait apparent. Recessive genes require one copy from both mom & dad to make trait apparent. Carrier is person w/one copy of recessive gene (from either mom or dad). ...Read more

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What is the difference between autosomal recessive and dominant?

What is the difference between autosomal recessive and dominant?

Gene effect: In dominant disorders, the dominant member of the gene pair controls how the gene activities are expressed, so the other gene can carry the same or normal information.In recessive disorders, the normal gene compensates for the bad information in the other gene, allowing a person to function normally unless both genes carry the bad information. ...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 hereditary disease causes iron build up in the blood? Recessive or dominant?

What hereditary disease causes iron build up in the blood? Recessive or dominant?

Hemochromatosis: There are 4 different type of hemochromatosis. Type 1, the most common form and type 4 are adult-onset disorders.Type 2 is a juvenile-onset disorder and iron accumulation begins early in life, and symptoms may begin to appear in childhood.Onset of type 3 is usually intermediate between types 1 and 2. Type 1, 2, 3 are autosomal recessive. Type 4 is autosomal dominant. ...Read more

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Angelman Syndrome and whether the gene is recessive or dominant?

Angelman Syndrome and whether the gene is recessive or dominant?

Angelman syndrome: The answer is neither- most cases are not inherited at all. http://ghr.nlm.nih.gov/condition/angelman-syndrome ...Read more