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Doctor insights on: A Recessive Gene Is Always Expressed

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What is a defective P53 gene. Is it inheritable?

What is a defective P53 gene. Is it inheritable?

Cell regulation: The P53 gene is thought to be involved in regulating cell death. When the P53 gene mutates or has a change from the normal gene, this may lead to types of cancers. ...Read more

Genetic (Definition)

From a medical standpoint, "genetic" refers to the potential heritability of various medical conditions. While some conditions are inevitable (at some point in one's life) as a consequence of simple genetic heritability (eg huntington's disease), a large number of medical conditions (including all behaviorial health disorders) are the expressed final pathway of a ...Read more


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Nearsightedness is a recessive trait. red-green color blindness is a sex-linked recessive trait, what does this mean?

Nearsightedness is a recessive trait. red-green color blindness is a sex-linked recessive trait, what does this mean?

An Autosomal: Recessive disorder: Both parents are unaffected carriers of a mutant gene. Each of their children has a 25% chance of inheriting the mutant gene from both & having the disorder. X-linked recessive: Mom carries a defective gene on one of her X chromosomes. Each son has a 50% chance of inheriting the X chromosome with the mutant gene & having the disorder; each daughter, 50% of being a carrier. ...Read more

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Why is progeria a dominant gene?

Why is progeria a dominant gene?

Progeria: Progeria is an extremely rare genetic disorder that may be seen at an early age and is unlikely to develop at age 48. Please go online to Wikipedia and read through the information. What is your height and weight? Are you getting shorter? Are you getting a change in weight? Once you have read the article you should probably see your doctor. ...Read more

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What is the genetic disorder progeria caused by? Is it a simple recessive trait?

What is the genetic disorder progeria caused by?  Is it a simple recessive trait?

Two likely forms: Progeria syndrome is considered a sporadic (new mutation) phenomenon that has few prenatal indicators. At an average birth wt of 6lb (2.7kg), the relatively small size during gestation is not specific to this disorder. There are rare instances of siblings to normal parents, showing that an autosomal recessive form exists.Most begin to show signs by 6-18mo. ...Read more

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Is there a defective gene in neurofibromatosis?

Is there a defective gene in neurofibromatosis?

Mostly genetic: Neurofibromatosis is a mostly inherited problem or mutation with degrees involvement from mild to severe. NF t autosomal dominant pattern of inheritance. People are born with one mutated copy of the NF1 gene in each cell. In about half of cases, the altered gene is inherited from an affected parent. Remaining cases result from new mutations in the NF1 gene, ...Read more

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Is sickle cell dominant or recessive in its inheritance?

Is sickle cell dominant or recessive in its inheritance?

Recessive: Sickle cell is autosomal recessive which means both parents must have a copy of the defective allele (one or both can be carriers but exhibit no symptoms). ...Read more

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Sickle trait is a recessive gene?

Sickle trait is a recessive gene?

basically yes: The mutation that causes sickle cell disease is a recessive mutation in that you need two copies of the changed gene to have the disease (or one copy plus another mutation on the other gene like beta thalassemia, hemoglobin c, hemoglobin e, etc). If you only have one copy, you have sickle cell trait. ...Read more

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Is the bcra gene a dominant or recessive gene. Can it skip a generation, or two?

Is the bcra gene a dominant or recessive gene. Can it skip a generation, or two?

See below: DNA repair genes, which BRCA 1 and 2 are, do not behave clearly as dominant or recessive, but for practical purposes you could consider these dominant. Not all women with the gene get cancer so it could skip a generation. See this site for more info. http://www.cancer.gov/about-cancer/causes-prevention/genetics/brca-fact-sheet ...Read more

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Is congenital ptosis of the eyelid a dominate trait or is it a recessive trait?

Is congenital ptosis of the eyelid a dominate trait or is it a recessive trait?

Congenital ptosis: Although some cases of congenital ptosis (CP) have been mapped to certain abnormal genes and display autosomal dominant genetics (50% chance of passing to child), the vast majority of cases are sporadic. There are only 2 large studies on the incidence of cp, the risk of a child being born with CP is 1:552 - 1:842 live births. ...Read more

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Is phenylketonuria (pku) is an inherited disease caused by a recessive gene? Parents would be carriers?

Correct: For a person to inherit pku they must receive a defective pah gene from each parent. Both parents are carriers. The chance of further children having pku is 1 in 4, and 2 out of 3 children who do not have pku will be carriers of the gene. ...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 it true that a neural tube defect is a chromosomal mutation or a gene mutation?

Yes and more: Neural tube defects can be brought on by genetics, nutrition, and environmental factors. Women who are deficient in Folic Acid before or during pregnancy are at a higher risk for neural tube defects. Women who are obese, have poorly controlled diabetes, or take medication such as Dilantin, Tegretol, or Depakote are at higher risk for neural tube defects or anencephaly. I hope this helps. Take c ...Read more

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Is cystic fibrosis sex linked is it recessive or dominate is there a chromosome it is located on?

Is cystic fibrosis sex linked is it recessive or dominate is there a chromosome it is located on?

Recessive, Chms 7: About 70 % of CF cases are due to a kid inheriting a delta 508 mutation gene from both parents.There are other mutations that can pair up with a 508 and still cause CF, which helps explain some of the variations in the disease. It is not sex linked or dominant. Carrier detection is available. ...Read more

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Hemochromatosis: is it possible to inherit both mutated genes from one parent, or is it always one from each parent?

One per parent: It's exceptional to inherit two alleles at one locus from a single parent, though there's some exceptional cases. Here's a heads-up, though -- hemochromatosis can occur in someone with just one dose if he/she takes in a lot of iron for some reason. Of all the highly lethal common diseases, hemochromatosis is the easiest by far to manage. ...Read more

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Is the beta-thalassemia gene recessive or dominant?

Neither: People normally have 2 beta globulin genes. A mutation in one or both genes leads to 3 levels of beta thalassemia. The genetics of the disorder is not all-or-none nor dominant-recessive. Instead, more or worse mutations causes worse disease. One mutation = beta thal trait (mild symptoms), 2 mutations = beta thal intermedia (transfusions sometimes) or beta thal major (lifelong transfusions needed). ...Read more

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Please help? Is the disease gigantism a dominant or recessive gene?

Please help? Is the disease gigantism a dominant or recessive gene?

Neither: Pituitary gigantism results from a pituitary adenoma, an acquired tumor. There are a few dozen genetic syndromes in which a person may be extra-tall; common Marfan's is a dominant; there's a dominant family syndrome in which people are prone to get pituitary gigantism; there's at least one rare autosomal recessive with gigantism with multiple birth defects. ...Read more

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Is obesity a dominant or recessive trait?

Is obesity a dominant or recessive trait?

Explanation : Neither. Obesity do not have even cleat trait. Too many factors play roles: lifestyle and diet, physical activity are the most important. ...Read more

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What are the chances of passing on the Cystic Fibrosis gene if only one parent is a CARRIER? Other parent not a carrier.

What are the chances of passing on the Cystic Fibrosis gene if only one parent is a CARRIER? Other parent not a carrier.

50-50: One half of offspring will be carriers and one half will not be carriers. No offspring will be afflicted. Thanks for trusting HealthTap! ...Read more

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What are dominant vs recessive gene diseases?

See below: With a dominant gene trait, the child only needs to receive one copy of the abnormal gene. So, they have a 50% chance of getting the gene. With a recessive gene, the child needs 2 copies of the gene. So, they have a 25% chance of having both genes. ...Read more

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Please help? Is the disease gigantism a dominant or recessive gene?

Neither: Pituitary gigantism results from a pituitary adenoma, an acquired tumor. There are a few dozen genetic syndromes in which a person may be extra-tall; common Marfan's is a dominant; there's a dominant family syndrome in which people are prone to get pituitary gigantism; there's at least one rare autosomal recessive with gigantism with multiple birth defects. ...Read more

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Is the bcra gene a dominant or recessive gene. Can it skip a generation, or two?

See below: DNA repair genes, which BRCA 1 and 2 are, do not behave clearly as dominant or recessive, but for practical purposes you could consider these dominant. Not all women with the gene get cancer so it could skip a generation. See this site for more info. http://www.cancer.gov/about-cancer/causes-prevention/genetics/brca-fact-sheet ...Read more

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Sickle trait is a recessive gene?

basically yes: The mutation that causes sickle cell disease is a recessive mutation in that you need two copies of the changed gene to have the disease (or one copy plus another mutation on the other gene like beta thalassemia, hemoglobin c, hemoglobin e, etc). If you only have one copy, you have sickle cell trait. ...Read more

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Are blue eyes a recessive gene?

Are blue eyes a  recessive gene?

Most likely: Eye color is a mixed collection of genetic traits but truly blur eyes and almost always a recessive trait which means that the color must be inherited upon both genes from the mother and the father. ...Read more

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Is a condition in the recessive gene one you get from both parents?

Is a condition in the recessive gene one you get from both parents?

Yes: Recessive diseases take 2 gene mutations;one from each parent. Dominant disease take only one gene. ...Read more

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Is phenylketonuria (pku) is an inherited disease caused by a recessive gene? Parents would be carriers?

Correct: For a person to inherit pku they must receive a defective pah gene from each parent. Both parents are carriers. The chance of further children having pku is 1 in 4, and 2 out of 3 children who do not have pku will be carriers of the gene. ...Read more

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If someone has a recessive gene for lynch syndrome and not the dominant/active one, would that show any symptoms in them like IBS/bowel issues or no?

If someone has a recessive gene for lynch syndrome and not the dominant/active one, would that show any symptoms in them like IBS/bowel issues or no?

Lynch Syndrome: Although the genetics are somewhat more complex than this question implies, Lynch syndrome does not cause any functional changes in the digestive tract. Those with Lynch syndrome do not tend to have IBS symptoms anymore than the general population. They certainly have an increased risk of cancer though. If you have it, be sure to get checked out early in life and frequently. Good luck. ...Read more

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Is the beta-thalassemia gene recessive or dominant?

Neither: People normally have 2 beta globulin genes. A mutation in one or both genes leads to 3 levels of beta thalassemia. The genetics of the disorder is not all-or-none nor dominant-recessive. Instead, more or worse mutations causes worse disease. One mutation = beta thal trait (mild symptoms), 2 mutations = beta thal intermedia (transfusions sometimes) or beta thal major (lifelong transfusions needed). ...Read more

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Is hodgkin's disease caused by recessive genes?

Is hodgkin's disease caused by recessive genes?

No: There is no proven genetic link of any kind in hodgkins disease. Some twin studies have shown an increased risk, but most people feel that this is more of a reflection of a common environment than common genetics. ...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

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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

Gene (Definition)

A hereditary unit consisting of a sequence of dna that occupies a specific location on a chromosome and determines a particular characteristic in an organism. Genes undergo mutation when their ...Read more


Dna (Definition)

Dna are the coding molecules found in all living things on earth which contain the instructions on how to build living things. Its is comprised the nucleotide molecules which are ...Read more