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A somatic cell that has just completed the S phase of its cell cycle, as compared to gamete of the same species, has

  • twice the number of chromosomes and four times the amount of DNA

  • same number of chromosomes but twice the amount of DNA

  • twice the number of chromosomes and four times the amount of DNA

  • four times the number of chromosomes and twice the amount of DNA

Answer

C.

twice the number of chromosomes and four times the amount of DNA

In general a gamete contains 'n' number of chromosomes (haploid) and 'x' amount of DNA. In comparison to the gamete, an (diploid) somatic cell usually have 2n number of chromosomes and 2x amount of DNA. But, after the cell enters and complete the 'S'-phase of its cell cycle, the DNA content of the cell becomes double (due to its duplication). However, the number of chromosomes remains the same. Hence, the somatic cell that has undergone and completed its 'S' phase of cell cycle will have twice the number of chromosomes and four times the DNA content.
                         

  Chromosomes DNA content
Gamete n x
Somatic cell (diploid) 2n 2x
Somatic cell (after S-phase) 2n 4x

In general a gamete contains 'n' number of chromosomes (haploid) and 'x' amount of DNA. In comparison to the gamete, an (diploid) somatic cell usually have 2n number of chromosomes and 2x amount of DNA. But, after the cell enters and complete the 'S'-phase of its cell cycle, the DNA content of the cell becomes double (due to its duplication). However, the number of chromosomes remains the same. Hence, the somatic cell that has undergone and completed its 'S' phase of cell cycle will have twice the number of chromosomes and four times the DNA content.
                         

  Chromosomes DNA content
Gamete n x
Somatic cell (diploid) 2n 2x
Somatic cell (after S-phase) 2n 4x