• Mental illness is caused by two factors. An inherited chemical imbalance in other words another person(s) in the child's family had a chemical imbalance. The other factor is severe physical or mental trauma or illness such as a brain tumor or post traumatic stress disorder. That said if the child's parents had no family history of chemical imbalance and the child had no severe trauma in his life he probably wouldn't have a mental illness. This info is just from personal experience and my own opinnion. BTW inorder for the mother/father to raise the child in a healthy manner it would be a good idea to get some therapy to work through what happened.
  • Oh produced from incest....well first there would be issues because of the chance of retardation. So yeah I would think that could constitute mental illness.
  • There is a higher instance of mental and physical problems from incestuous or close relative relationships . This is because of the similarity of any malfunctioning genes the body being inherited doubled because ot the close relationship This is a very simple explanation of a quite intricate problem
  • Children produced from incest are much more likely to suffer from all forms of genetically caused diseases, both mental and physical. This is because they are much more likely to have two copies of a bad variant of a gene (inherited on both sides) than someone whose parents are unrelated.
  • the chances are higher but from what I have read recently not as much as believed for first generation offspring. It greatly increases with succeeding generaions such as brother and sister and their children and their children as they keep in the family. This occured mostly when reigning kings wanted to keep the family in power and eventually caused the downfall of that counry because the 4th and 5th generations were so imbred they were all physically and mentally retarded. Just found this bit of information that will help answer this question much better:
  • um, no. in fact, the chance of 'retarded' or negatively defected children from incestous parents (eg brother and sister) is only ONE PERCENT higher than a normal, unrelated pregnancy!
  • 1) "The limited gene-pool caused by continued inbreeding means that deleterious genes become widespread and the breed loses vigour. Laboratory animal suppliers depend on this to create uniform strains of animal which are immuno-depressed or breed true for a particular disorder e.g. epilepsy. Such animals are so inbred as to be genetically identical (clones!), a situation normally only seen in identical twins. Similarly, a controlled amount of inbreeding can be used to fix desirable traits in farm livestock e.g. milk yield, lean/fat ratios, rate of growth etc. In human terms, inbreeding is considered incest; cats do not have incest taboos." Source and further information: 2) "Amid all the confusions, it is very well accepted that among genetic disorders, only autosomal recessive disorders are strongly associated with consanguinity. However, there are ample of studies showing that in a population with a high rate of consanguinity, there is a significant increase in the prevalence of common adult diseases like mental disorders, heart diseases, gastro-intestinal disorders, hypertension, hearing deficit, and cancer. Interestingly though, a study in Arab populations, however demonstrated that reduction of overall cancer risk was associated with increased coefficient of inbreeding (F). Both older and younger healthy men had significantly higher F but only women over 30 years of age with higher F had reduction of overall cancer risk. This study showed that being more inbred was associated with a reduction in overall cancer risk by about 25%. I am not sure what to make of the relationship between inbreeding and cancer but I am certain that in breeding may have adverse affects in humans and it should not be encouraged. References: · Kobeissi and Inhorn; Health issues in the Arab American community. Male infertility in Lebanon: a case-controlled study. · Kerkeni et. al.; Interplay of socio-economic factors, consanguinity, fertility, and offspring mortality in Monastir, Tunisia. · Saadallah and Rashed; Newborn screening: experiences in the Middle East and North Africa. · Hashemipour, et. al.; Parental consanguinity among parents of neonates with congenital hypothyroidism in Isfahan. · Hamamy, et. al.; Consanguinity and genetic disorders. Profile from Jordan. · Bener, et. al.; Consanguineous marriages and their effects on common adult diseases: studies from an endogamous population. · Denic et. al.; Risk of cancer in an inbred population." Source and further information: 2) "The offspring of consanguinous relationships are at greater risk of certain genetic disorders. Autosomal recessive disorders occur in individuals who are homozygous for a particular recessive gene mutation. This means that they carry two copies (alleles) of the same gene. Except in certain rare circumstances (new mutations or uniparental disomy) both parents of an individual with such a disorder will be carriers of the gene. Such carriers are not affected and will not display any signs that they are carriers, and so may be unaware that they carry the mutated gene. As relatives share a proportion of their genes, it is much more likely that related parents will be carriers of an autosomal recessive gene, and therefore their children are at a higher risk of an autosomal recessive disorder. The extent to which the risk increases depends on the degree of genetic relationship between the parents; so for incestuous relationships where the parents share 1/2 of their DNA the risk is great, but for relationships between second cousins where the parents only share 1/32 of their DNA the risk is less (although still greater than the general population)." Source and further information:

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