Sexual Reproduction

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Sexual Reproduction

• Ch 38.1 Guide
• Ch 38.2 Development

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I1.Sexual/Asexual Reproduction

• Asexual
• Exact copy
• Mitosis
• One parent
• Constant conditions

• Sexual
• Genetic variety
• Meiosis eggs sperm
• Two parents
• Changing conditions

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Asexual examples Hydra
Regen-eration Of cut pieces

• Budding
• of polyps

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Amoeba asexual division
2nd amoeba

• Nucleus

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Asexual Reproduction
Runners in strawberries
Spores in Puffball Mushrooms
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Sexual Reproduction
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Joey develops in a Pouch
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Flowering Plants Sexual Reproduction
Dry Pollen For sperm
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Ferns Sexual Asexual Reproduction
Sexual Asexual
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Comparison of Egg Sperm

• Egg
• Round
• Floats
• Food reserves
• One
• Ovaries
• 1N

• Sperm
• Oval
• Flagella
• No food reserves
• Many secrete enzyme to penetrate egg membrane
• Testicles
• 1N

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Meiosis in the Gonads
Sperm
Meiotic cell division
Egg
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Gonads make gametes!
Testes make sperm
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Chromosomes
Sex Chromosome Y determines a Male
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Gonads make gametes!
Ovaries make eggs
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Tubal ligation
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Reproduction Hormones
Hormone Produced by Function
Testosterone Testicles Male sex traits
FSH Pituitary Stimulates LH
LH Pituitary Release of egg
Estrogen Ovaries Female sex traits
Progesterone Corpus luteum Maintains Uterus lining
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Menstrual Cycle