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In: Biology

The sperm cells of a domesticated cat, Felis domesticus, has 19 chromosomes. How many chromosomes are...

The sperm cells of a domesticated cat, Felis domesticus, has 19 chromosomes. How many chromosomes are in the cat's somatic cells?

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Ans.

  • Any animal undergoing cell reproduction, their cells will divide in either of two ways;
  1. Mitosis of somatic cells or body cells, and
  2. Meiosis of gametes or sex cells
  • Each of these processes create different number of daughter cells having different chromosomal counts.
  • Mitosis helps in repairing a wound, growth of an organism and asexual reproduction in some organisms.
  • End result of mitosis is 2 daughter cells identical to the original cell and having same number of chromosomes.
  • Meiosis is comprise of 4 stages ; prophase, metaphase, anaphase and telophase.
  • After the completion of meiosis, 2 daughter cells will be produced having same number of chromosomes as the parent cell.
  • Cats have definite chromosome numbers including a pair of sex chromosome designated as X and Y.
  • Domesticated cats have 38 chromosomes in the somatic cells which are divided equally (19) into sperm cells and eggs in the meiosis to produce a daughter cell.
  • Thus, upon fertilization of a sperm, two half-pairs of the chromosomes are merged resulting in 38 chromosomes in daughter cells.

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