If gametes are formed by mitosis, they will have the same chromosome number as body cells. Fertilisation would double the chromosome number, causing genetic imbalance.
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If gametes are formed by mitosis, they will contain the full set of chromosomes instead of half. During fertilisation, the chromosome number would double, leading to abnormal cells. This would disrupt genetic balance and cause serious developmental problems. Meiosis is essential to maintain the correct chromosome number in sexually reproducing organisms.
For more NCERT Solutions of Class 9 Science Exploration Chapter 2 Cell: The Building Block of Life (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-2/