Answer :
Homo sapiens have 23 pairs of chromosomes. This implies 46 double-stranded DNA molecules are present in each somatic cell.
Each chromosome is made up of two DNA strands that are joined together by hydrogen bonds to form the familiar DNA double helix (double-stranded DNA). Consequently, each diploid human cell consists of 92 strands of DNA in sum.
Each human cell contains two copies of each chromosome, one inherited from the mother and one from the father, with the exception of the germ cells and a few highly specialised cell types (like red blood cells) that cannot multiply and lack DNA altogether. Homologous chromosomes are the pair's maternal and paternal chromosomes (homologs). The sex chromosomes in males, where a Y chromosome is inherited from the father and an X chromosome from the mother, are the only nonhomologous chromosome pairs. Therefore, each human cell has 46 chromosomes in total—22 pairs that are the same for both sexes, plus two so-called sex chromosomes (X and Y in males, two Xs in females).
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