Doctor insights on:
Is Thalassemia Dominant Or Recessive
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 moreSee 1 more doctor answer
None of the above: Edward syndrome is brought on by an abnormality of chromosome numbers, specifically an extra 18. The abnormal egg with a single chromosome 1-17 & 19-22 + x has a pair of 18's. When the sperm brings a single chromosome 1-22 + x or y then the embryo ends up with 47 chromosomes rather than 46 in every cell.(3-18's) the excess distorts the organ building information & defects arise. ...Read moreSee 1 more doctor answer
Neither: 90-90% of case of ALS are not inherited, it occurs at random at its cause is not known. In 5-10% of cases there is a familial form of the disease. In these 5-10% of cases it is usually dominant (meaning it is only necessary to have one copy of the defective gene) remember however most of the time it is not inherited at all. ...Read moreSee 1 more doctor answer
Neither: Turner syndrome is not caused by a variation of a gene, or a mutation of a gene. Therefore, Turner syndrome is neither dominant or recessive, but instead is a type of aneuploidy. Aneuploidy means there is an abnormal number of chromosomes. Turner syndrome's type of aneuploidy is "monosomy X", which means having only one X chromosome, and no Y nor a second X chromosome. ...Read moreSee 2 more doctor answers
Neither: 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. ...Read more
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