Question

"Each organism has two sets of all genes, one inherited from each parent i.e. both parents contribute equally to the DNA of the progeny during sexual reproduction".

If such is the case, then how is the stability of DNA of the species ensured? Discuss.

Accepted Answer

Meiosis reduces chromosome number by half in germ cells (haploid), so fusion during fertilization restores the diploid DNA amount.. - Organisms involved in sexual reproduction form specialized reproductive cells (gametes) through a special cell division process called **meiosis** (reduction division). - Meiosis halves the number of chromosomes and the amount of DNA in germ cells, making them haploid ($n$). - When two haploid gametes (male and female) fuse during fertilization, the resulting zygote restores the original diploid ($2n$) chromosome number and DNA content. - This maintains the constant DNA content and genetic stability across successive generations of a species.

DNA Stability in Reproduction

Explanation

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