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Originally posted by mayabong
I just know that Gorillas have 48 chromosomes.
Down Syndrome people have 47 chromosomes
and regular humans have 46 chromosomes.
So what ya think? Could the missing link be right in front of our eyes?
Can this explain the super human strength that down syndrome people have?
edit on 4-2-2011 by mayabong because: (no reason given)
Originally posted by daraSD
No, down's syndrome people are not the missing link between humans and gorillas.
Living things require pairs of chromosomes, i.e. - even numbers.
Occasionally nature has a hiccup, and you end up with a missing one, and the organism is abnormal/imperfect/deformed/*insert whatever other "offensive" term here*
Human cells divide in two ways. The first is ordinary cell division ("mitosis"), by which the body grows. In this method, one cell becomes two cells which have the exact same number and type of chromosomes as the parent cell. The second method of cell division occurs in the ovaries and testicles ("meiosis") and consists of one cell splitting into two, with the resulting cells having half the number of chromosomes of the parent cell. So, normal eggs and sperm cells only have 23 chromosomes instead of 46.
Many errors can occur during cell division. In meiosis, the pairs of chromosomes are supposed to split up and go to different spots in the dividing cell; this event is called "disjunction." However, occasionally one pair doesn't divide, and the whole pair goes to one spot. This means that in the resulting cells, one will have 24 chromosomes and the other will have 22 chromosomes. This accident is called "nondisjunction." If a sperm or egg with an abnormal number of chromosomes merges with a normal mate, the resulting fertilized egg will have an abnormal number of chromosomes. In Down syndrome, 95% of all cases are caused by this event: one cell has two 21st chromosomes instead of one, so the resulting fertilized egg has three 21st chromosomes. Hence the scientific name, trisomy 21. Recent research has shown that in these cases, approximately 90% of the abnormal cells are the eggs. The cause of the nondisjunction error isn't known, but there is definitely connection with maternal age. Research is currently aimed at trying to determine the cause and timing of the nondisjunction event.