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Sexual Reproduction
Ch 38.1 Guide
Ch 38.2 Development
I1.Sexual/Asexual Reproduction
Asexual
• Exact copy
• Mitosis
• One parent
• Constant conditions
Sexual
• Genetic variety
• Meiosis = eggs & sperm
• Two parents
• Changing conditions
Asexual examples: Hydra
Budding
of polyps
Regen-erationOf cut pieces
Amoeba asexual division
2nd amoebaNucleus
Asexual Reproduction:
Runners in strawberries
Spores in Puffball Mushrooms
Sexual Reproduction
“Joey” develops in a Pouch
Flowering Plants Sexual Reproduction
Dry PollenFor sperm
Ferns Sexual & Asexual Reproduction
Sexual & Asexual
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
Meiosis in the Gonads
Sperm
Meiotic celldivision Egg
Gonads make gametes!
Testes makesperm
Chromosomes
Sex Chromosome Y determines a Male
Gonads make gametes!
Ovaries make eggs
Tubal ligation
Reproduction HormonesHormone 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
Menstrual Cycle