Chapter 8

Chapter 8 - Chapter 8- Sex and Evolution Sexual...

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Chapter 8- Sex and Evolution Sexual Reproduction o Reproduction done through the production of gametes Male gamete (sperm) and female gamete (ovule/egg) join together in fertilization Form single cell, zygote Mix genetic material of both parents Gametes are formed by meiosis, cell division that takes place in the primary sex organs Parent cells are diploid- have 2 chromosomes each End cells are haploid and only have one chromosome, gametes are haploid so when they join together they become diploid o Asexual reproduction Products are identical to one another and to single parent Common in plants Clone- descend asexually from parent and have same genotype Parthenogenesis- reproduction by forming diploid eggs In sex organs, germ cells develop into egg cells without going through meiosis so all eggs are identical Selfing- organisms that produce both female and male sex organs and then fertilize themselves o Costs to the organism Sex organs are expensive organs that benefit the organism none
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Chapter 8 - Chapter 8- Sex and Evolution Sexual...

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