As-Salāmu `Alaykum (السلام عليكم):
A British study in part:
"There has been a bit of a push of people saying that consanguineous marriage is dangerous and should be banned but before we start making decisions on that we need to look at the data," he says.
The genetic conditions more common in populations with high rates of consanguineous marriage are rare recessive disorders which cause a wide range of problems, such as blindness, deafness, skin diseases, and neurodegenerative conditions.
We all carry gene mutations and sometimes, such as in the case of cystic fibrosis, they are fairly common in the general population.
But when a population has a small gene pool the gene mutation can become more frequent.
If two people carrying a recessive gene reproduce, their children have a one in four chance of having the disorder and a one in two chance of becoming carriers themselves.
A question? Is this more cultural than based upon Islam? This practice was practiced during the times of Nabi Muhammad (SAWS) but he also married within different cultures and religions. One of the Ummul-Muminin Zaynab bint Jahsh was his first cousin. The community was small, etc.
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