Is there a significant corelation between mental retardation and incest/inbreding?

Question

I know in Biology and some other specfic science studies, inbreeding can case mental retardation/defects in their offspring. So, can we assume that mental retardation is caused by some type of inbreeding or incest of some sort or is it random and can happen to just about anyone?

Answer 1

Yes there's a correlation, but incest isn't the only thing that causes retardation. There are numerous other factors that lead to irregularities and don't have anything to do with incest.

Answer 2

There were studies made on this particular subject matter. Prominent of this is the Mendelssohn's study of dwarfism found among offsprings of related parents. And the incidence of mental retardation is common among offspring of partners of familial relationships. However, that is not the only cause of mental retardation. As there are different types of mental retardation.

I wonder about this sometimes. When God destroyed the earth. Beforehand, He instructed Noah to build an Ark and gather his family and some animals and birds to survive the 40 days of flood.Isn't it possible to concede as there were no survivors, inbreeding was common. Just think of Adam and Eve as the only sole human creation of God. How did the people multiply.? Wasn't there cases of incest and inbreeding, thus propagating the incidence of mental retardation. This is particularly true if the cause of the mental retardation is chromosomal abnormalities. Such diseases are Tay-Sachs, sickle cell anemia, muscular dystrophy.,Down's syndrome, chronic schizophrenia, low IQ's and other mental problems

Incest or conguinuos mating ,marriage among close relatives is common among Middle East where the people stay in the same villages or cities for generations. So, in conclusion, inbreeding and incest can cause mental retardation.

Answer 3

The problem with incest/inbreeding is that genetic flaws will be multiplied in each successive generation... this can lead to very low IQ's which is what some forms of mental retardation are... this also will cause things like poor joint function, poor heart function, and all around poor body function. inbreeding is a horrible idea whether in humans or animals. many purebred cats and dogs have such horrible knee joints that they can hardly walk by the time they are a few years old.

Answer 4

It can happen at random. Either parent may contribute defective genetic material, or the mother may have taken medications that affect the developing fetus without knowing she was pregnant, or have been exposed to something in the environment.

Inbreeding can cause it also. If the trait for a form of retardation is recessive, but it runs in a family or clan, members of the group who have a child together have a higher risk of both of them will carry that particular gene. If this particular egg and sperm both provide the recessive gene, the baby will probably be retarded.

Answer 5

Yes, because close relatives share more lethal recessive genes than more distantly related partners do. The probability of giving birth to a deformed child by incest has been exaggerated: it happens when there is incest over a long period of several generations. So if you are going to have incest, use contraception.

Answer 6

For years upon years many in the clinical container and in the residences believed autism to be a sort of retardation, particularly because there are thousands of tiers of severity to autism, starting from speechless to being mute and having no administration of the body or its applications. the major physiological differences between retardation and autism is that retardation in a genetic flaw regularly ensuing in odd chromosomes yet no longer continually (see fetal alcohol syndrome and different drug/environmental appropriate beginning defects). Autism is amazingly a developmental concern of the mind that scientists have not fairly figured its foundation or major causes, even with the actuality that there are a variety of of theories. Autism typically received't rear its ugly head till about the time maximum kids start up talking, while retardation is regularly fairly glaring (facial/structural deformation, habit). i wish this develop into of a few help, my newborn progression psychology practise coated this about a twelve months in the past.

Answer 7

Mental retardation is a deficiency in the way the brain learns, or in its capacity for learning. It's caused by hereditary factors carried by genes.

Yes, incest causes a higher frequency of mental retardation. The reason it does so is by pairing the recessive genes that cause the condition. Recessives are usually invisible and have no effect on the organism carrying them because they are paired with dominant genes that win the "tug of war" for control.

When parents from different families mate, they usually carry a different set of dominants and recessives. The bad recessives don't align with each other, so they stay invisible.

When parents from the same family mate, much more of their recessives are shared in common, and that gives the bad ones a chance to be expressed in the physical structure of their children.

Now, understand this. Incestuous matings were used by many ancient peoples to cause the births of children in whom their parents' recessive genes were paired. Why?

Incest does not always do anything bad to the children who result. It merely has a significantly higher chance for doing so. On those occasions for which a child was born from an incestuous mating but did NOT have any genetic flaws, that genetically fortunate child had FEWER BAD RECESSIVE GENES than either of his parents did.

Of course, many children born from incest in those ancient civilizations were defective. Their particular mix of genes gave them genes worse than their parents had, and so the ancient people killed them.

Normal outbreeding gives a fairly consistent range of human quality in children, which is sort of a bell curve centered on an average. In-breeding gives a bimodal, or two-humped, distribution of human quality. One of the humps is inferior to the average for outbreeding, but the other hump is superior to the average for outbreeding.

If inbreeding with culling (eliminating the defectives) is consistently practiced, each generation will have fewer bad recessives than the one before did. Eventually the bad recessives in the gene pool of the race can be isolated and destroyed, leaving a "purified" race. A purified race can continue to inbreed without risk of harmful effects from paired recessives.

By killing the offspring belonging to the inferior hump and keeping only the children belonging to the superior hump, the ancient peoples were able to drastically improve their bloodlines: concentrating their genetic gifts and dumping their genetic liabilities.

Inbreeding is very bad without culling. But with culling (killing or sterilizing the defectives) it can be very good. The world will probably be won by the first race of hominids which finds enough grit to practice eugenics with determined rigor.

Answer 8

You're looking at it wrong.

Inbreeding can cause mental retardation. However, that doesn't mean that ALL retardation is caused by inbreeding.

That's kind of like saying, "Knives can cut you. Therefore, anyone you see who has a cut got cut by a knife." it's just not ture. Sure, sometimes knives cut people, but so do scissors, razor blades, and a whole myriad of other sharp objects.

Answer 9

Mental retardation has thousands of causes, and inbreeding by close relatives is only one of them.

Answer 10

Yes, there is a causal corelation. Your family has (roughly) the same genes as you. That means you might share similar dominant and recessive traits. Breeding amongst your own [genetically-related] family increases chances of recessive (and possibly malignant) traits surfacing where otherwise they would be overshadowed by default by dominant traits.