Write notes on significance of mitosis/ significance of meiosis ?
Significance of Mitosis –
1) Mitosis produces two genetically
identical cells, so mitosis maintains the genetic stability of organisms.
2) DNA remains constant, mitosis keeps
the chromosomes number constant in a species.
3) Mitosis
helps in the growth and development of multicellular organism.
4) Mitosis
helps to replacement of old, dead or damaged cells by new one.
Significance of meiosis –
1) It
maintains the same chromosome n umber in the sexually reproducing organisms.
From a diploid cell, haploid gametes are produced which in turn fuse to form a
diploid cell.
2) It
restricts the multiplication of chromosome number and maintains the stability
of the species.
3) Maternal
and paternal genes get exchanged during crossing over. It results in variations
among the offspring.
4) All
the four chromatids of a homologous pair of chromosomes segregate and go over
separately to four different daughter cells. This leads to variation in the
daughter cells genetically.
Significance of Mitosis –
1) Mitosis produces two genetically identical cells, so mitosis maintains the genetic stability of organisms.
2) DNA remains constant, mitosis keeps the chromosomes number constant in a species.
3) Mitosis helps in the growth and development of multicellular organism.
4) Mitosis helps to replacement of old, dead or damaged cells by new one.
Significance of meiosis –
1) It maintains the same chromosome n umber in the sexually reproducing organisms. From a diploid cell, haploid gametes are produced which in turn fuse to form a diploid cell.
2) It restricts the multiplication of chromosome number and maintains the stability of the species.
3) Maternal and paternal genes get exchanged during crossing over. It results in variations among the offspring.
4) All the four chromatids of a homologous pair of chromosomes segregate and go over separately to four different daughter cells. This leads to variation in the daughter cells genetically.
