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i have a friend...
Former Member
Posts: 1,876,323 The Mix Honorary Guru
who wants to marry his sister!
what are the heatlh risks associated with pregnancy where your sister is going to be the mother
what are the heatlh risks associated with pregnancy where your sister is going to be the mother
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Another theory is that the observance of the taboo would lower the incidence of congenital birth defects caused by inbreeding. Anthropologists reject this explanation for two reasons. First, inbreeding does not lead to congenital birth defects per se; it leads to an increase in the frequency of homozygotes. A homozygote encoding a congenital birth defect will produce children with birth defects, but homozygotes that do not encode for congenital birth defects will decrease the number of carriers in a population. If children born with this type of heritable birth defect die (or are killed) before they reproduce, the ultimate effect of inbreeding will be to decrease the frequency of defective genes in the population. Second, anthropologists have pointed out that in the Trobriand case a man and the daughter of his father's sister, and a man and the daughter of his mother's sister, are equally distant genetically. Therefore, the prohibition against relations is not based on or motivated by concerns over biological closeness.
http://www.answers.com/topic/incest-taboo
If a recessive condition is present in the DNA of both parents there is a 1 in 4 chance that the child will be born with the condition. As your friend and his sister have come from the same parents there is a 25% chance that they will carry any recessive genetic conditions that either parent had.
A recessive gene is one where two copies of the allele need to inhereted to cause the phenotype (condition/characteristic). so if you haveone copy of the gene you will be a carrier of the condition, if you have two you will suffer from the condition.
Due to it being a recessive condition there will be no signs (in most cases) that either parent has the defect and unless they are tested for every genetic condition known to man they wont even know that they have it.
I dont know wether you know anything about genetics but if you dont the picture below shows how inheretance works
Examples of conditions that are inherited from a genetically recessive gene are cystic fibrosis or sickle cell anemia
Bollocks.
It's about recessive genes. Hundreds of years ago inbreeding in the Royal family resulted in haemophilia - which is a disease.
Its called inbreeding Muppet.
Why do you think that pedigree dogs get so many problems with their bones and die so much younger? Inbreeding.
Someone ring Mendel and tell him that all his research was wrong. Mite as well scrap the idea of DNA while were there.
How do you get cystic fibrosis if not due to the matching of two recessive alleles?
How do you get sickle cell anaemia if not due to the matching of two recessive alleles?
And is it not much more likely that people with the similar DNA will come from the same family?
If its not why are family members usually the most suitable to be donors for kidneys and such?
Must be sheer chance I suppose....
And a "friend" wants to hump their sister, huh... a "friend..." :yeees::chin:
Its always "friend"
My Name is right, it's always "a friend", come clean, it's you really isn't it. I take it your sister feels the same weird way?
just what i was thinking.
:yuck: