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Essay on Evolution of Sexual Reproduction
Most organisms pass on only half their genes when they reproduce, mingling their genome with that of another. Sexual reproduction not only halves an individual's contribution to the next generation, it leads to all sorts of trouble and expense.
Popular explanations for the evolution of sexual reproduction hold that sexual recombination of genes allows beneficial mutations to accumulate faster and that it helps to limit the spread of harmful mutations.
Sexual reproduction also separates beneficial and harmful mutations from each other, allowing good mutations to break free of bad company. Formation of new individual by a combination of two haploid sex cells (gametes).
- Fertilization - combination of genetic information from two separate cells that have one half the original genetic information
- Gametes for fertilization usually come from separate parents
- Female produces an egg
- Male produces sperm
- Both gametes are haploid, with a single set of chromosomes
- The new individual is called a zygote, with two sets of chromosomes (diploid).
- Meiosis is a process to convert a diploid cell to a haploid gamete, and cause a change in the genetic information to increase diversity in the offspring...........
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