What is chromosomes explain how in sexually reproducing organism the number of chromosome in the pregnancy is maintained?
Answers
In sexually reproducing organisms, the gametes undergo meiosis and hence, each gamete contains only half set of chromosomes. When two gametes fuse, the zygote formed contains the full set of chromosomes. Hence, the formation of gametes by meiosis helps to maintain the number of chromosomes in progenies
Chromosomes are the structures that bear the DNA or genes. They carry the DNA or genes to the progeny cells.
1. There are special linages of cells in the sexually reproducing organism.
2. These cells undergo a special type of cell division, called meiosis; consequently, the germ cells formed have only half the number of chromosomes as the parents cell.
3. When two such germ cells (with half the number of chromosomes) fuse, a zygote/new individual is formed with the same number of chromosomes as the parent organism.