Question 1

is down syndrome dominant , recessive , polygenic inheritance , multiple alleles , sex linked, codominance , or incomplete dominance ?

Accepted Answer

Abn. cell division: Most cases of Down syndrome are not inherited. When the condition is caused by trisomy 21, the chromosomal abnormality occurs as a random event during the formation of reproductive cells in a parent. The abnormality usually occurs in egg cells, but it occasionally occurs in sperm cells. An error in cell division called nondisjunction results in a reproductive cell with an abn. number of chromosoms

Question 2

is neurofibromatosis a polygenic disorder, or is there a single mutation?

Accepted Answer

Single gene disorder: Neurofibromatosis type 1 is caused by a mutation of the nf1 gene on chromosome 17. This gene normally allows your cells to make a protein called neurofibromin. So far we have found more than 500 different mutations in this gene in people with this condition. You just need one mutation to get nf1 - half the time it comes out of the blue, and half the time it's inherited from a parent.

Question 3

can you tell me why the major histocompatibility complex of genes is considered to be both polygenic and polymorphic.?

Accepted Answer

Loci and alleles: There are multiple loci for the MHC genes, three for just the MHC class I genes, this would be polygenic. Each locus has different types of genes at the site in different people. The latter is called polymorphism.
See this site for details.
http://www.ncbi.nlm.nih.gov/books/NBK27156/

Question 4

is lieing  a hereditary  trait?

Accepted Answer

Not that I know of.: However, it may be a learned behavior.

Question 5

what traits characterize an obsessive disorder?

Accepted Answer

Repetitive thoughts: Intrusive, usually unwanted, bothersome repetitive thoughts. They come in many favors and often lead to compulsions. Obsessions are the bothersome, intrusive recurring thoughts. Compulsions are behaviors that attempt to get relief from obsessions. It's important to remember that everyone has some obsessive traits. What makes it a disorder is when it impairs day-to-day life.


 Day-to-day life.

Question 6

what causes most cases of gigantism ? is it an inherited trait ?

Accepted Answer

XS Growth Hormone: Pituitary gigantism is a rare disorder and typically is a sporadic and isolated condition. However, it can occur within the context of a coexisting disorder or arise according to a pattern of familial inheritance. Syndromes in which gigantism is a well-recognized feature include mccune albright syndrome, multiple endocrine neoplasia type i, and carney complex.

Question 7

what is trait thalassemia?

Accepted Answer

Ok: Thal trait is different from thal major--the trait has one chromosome for this disease and the full disease means each parent gave the  trait and that the child got a thalassemia gene from each parent which can cause thal major, a very serious and transfusion requiring process.   There are different types of thalassemia--some more concerning than others.  Please ask your doctor.

Question 8

what is thalassemia and thalassemia trait?

Accepted Answer

Cooley's Anemia: Thalassemia is a blood disorder passed down through families (inherited) in which the body makes an abnormal form of hemoglobin, the disorder results in excessive destruction of red blood cells, which leads to anemia. Thalassemia trait is a genetic possibility you pass on to your offspring. The most important reason for discovering if you carry the thalassemia trait is this: if two people who each.

Question 9

what are the mental traits of marfans syndrome?

Accepted Answer

Well...: From the Psychological point of view, there are no traits specific to Marfan's syndrome.
Please read the following:http://www.childrenshospital.org/health-topics/conditions/marfan-syndrome

Question 10

what are typical ocd traits?

Accepted Answer

OCD: Obsessive compulsive disorde is when there are endless cycle of repeatative thoughts and bahaviour .Recurring and disturbing thoughts and fears a person can not control.Anxiety produced by these thoughtslead to an urgent need to perform certain rituals and routines.Rituals are done to prevent obssesive thoughts and make it go away.It can be washing hands, taking baths, cleaning and other rituals.

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Doctor answers about:

Polygenic inheritance traits

A member asked:

Is down syndrome dominant , recessive , polygenic inheritance , multiple alleles , sex linked, codominance , or incomplete dominance ?

A member asked:

Is neurofibromatosis a polygenic disorder, or is there a single mutation?

A member asked:

Can you tell me why the major histocompatibility complex of genes is considered to be both polygenic and polymorphic.?

A member asked:

Is lieing a hereditary trait?

A member asked:

What traits characterize an obsessive disorder?

A member asked:

What causes most cases of gigantism ? is it an inherited trait ?

A member asked:

What is trait thalassemia?

A member asked:

What is thalassemia and thalassemia trait?

A member asked:

What are the mental traits of marfans syndrome?

A member asked:

What are typical ocd traits?

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