Egypt's geological history has produced four major physical regions: the Nile Valley and Delta, the Western Desert (also known as the Libyan Desert), the Eastern Desert (also known as the Arabian Desert), and the Sinai Peninsula.
Abbreviation: Ks values. A synonymous mutation is a change in the DNA sequence that codes for amino acids in a protein sequence, but does not change the encoded amino acid. Due to the redundancy of the genetic code (multiple codons code for the same amino acid), these changes usually occur in the third position of a codon.
This type of substitution is called a synonymous or sense mutation; it is also known as a silent mutation because there is no change in the amino acid sequence. (Find out how silent mutations can still have an effect on the gene and its resulting protein.). slide 3 of 5.