Feryal Hashim Rada*
The human body is composed of diploid cells that carry identical DNA and haploid gametes (egg and sperm) that carry sex chromosome either X or Y. The human genome is composed of over 3 billion base pairs of information organized into 23 chromosomes. Only 1.5% of the entire genome is called coding region and is responsible for encoding and regulating protein synthesis. Other 75% of the entire genome is called non coding region and is contain extragenic DNA, about 50% of these DNA formulated repetitive DNA, which has a particular use in forensic analysis.
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