J
Jadesfire20
Guest
Not really…there isn’t a specific function delegated to each chromosome. Genes are pretty much randomly scattered across the genome. For example, some genes involved in the production of sperm are found on the X chromosome, not the Y!Thanks for the clarification. I was pleased to discover that in my ignorance I managed to be correct. . . I didn’t say it was genetically identical, only that it had the same chromosomes (in terms of number and the general function of each chromosome.) At least I think that’s correct. . . don’t specific chromosomes have specific functions, such that many disorders can be traced to a flaw in a particular chromosome, i.e., down syndrome?
Down’s syndrome is caused by three copies of chromosome 21 or sometimes by a translocation whereby a portion of chromosome 21 breaks off and becomes attached to another chromosome so that the person has 3x the dosage of that region of 21. The actual gene(s) involved in the Down’s syndrome characteristics…mental retardation, facial abnormalities, etc. are not yet known. The brain is very sensitive to dosage so there are many diseases that have mental retardation as a symptom but have nothing to do with chromosome 21. For example Angelman’s syndrome patients have severe mental retardation, in addition to seizures and laughing out of context, but the genes involved in this disease are on chromosome 15