Question

what is the significance of meiosis?

Answer 1

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.

Answer 2

Significance of meiosis:

 Maintains specific chromosome number of each species.

 Crossing over and random recombination increases genetic variability in population. Variations are very important for the process of evolution.    

 At times causes chromosomal mutations by abnormal disjunctions. Genetic disorders like Down’s syndrome and Turner’s syndrome are due to non-disjunction of chromosomes during Anaphase 1.

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