In Class 10 Biology (How do Organisms Reproduce?), one of the most commonly asked questions compares sexual and asexual reproduction.
Main Advantage: Genetic variation leading to better adaptation.
Asexual Reproduction: Produces clones — no variation.
Evolution: Only possible with the genetic variation sexual reproduction provides.
1. Genetic Variation Sexual reproduction combines DNA from two parents, creating offspring that are genetically unique and different from both parents. This variation is absent in asexual reproduction (which produces clones).
2. Better Adaptation and Survival Because of genetic diversity, some offspring will have traits better suited to changing environments. If a disease kills one type, others with different traits survive. Asexual offspring are all identical — if one is susceptible to a disease, all are.
3. Drives Evolution Genetic variation is the raw material for natural selection. Without variation (as in asexual reproduction), evolution cannot occur. Sexual reproduction is the engine of evolution.
4. Elimination of Harmful Mutations Harmful mutations that appear in one parent can be diluted or masked by the healthy genes from the other parent in sexually produced offspring.
The main advantages are: 1) Genetic variation — offspring are unique. 2) Better adaptability to environmental changes. 3) It drives evolution through natural selection. 4) Harmful mutations can be masked by healthy genes from the other parent.
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