1 Muscle weakness and Pain in the joints and Sudden onset of joint pain and Arthritis-like symptoms (3 causes) 2  Muscle weakness and Pain in the joints and Sudden onset of joint pain and Body symptoms (3 causes)  Muscle weakness and Pain in the joints and Sudden onset of joint pain and Bony abnormalities (3 causes)
The other two chromosomes, X and Y, are the sex chromosomes. This picture of the human chromosomes lined up in pairs is called a karyotype. In humans, each cell normally contains 23 pairs of chromosomes, for a total of 46.
Each cell in the human body contains 46 chromosomes. If you unravelled the DNA from each chromosome and put the 46 segments end-to-end, each cell would contain about 2 metres of DNA. Each piece of DNA is around 4-5 cm long.