UNIT 6: Reproduction“A Zillion Ways to Make More”
Ms.Liu
Biology
2/15/12
Sexual Reproduction
Sperm + ovum fertilized egg
GAMETES ZYGOTE
MEIOSIS vs. MITOSIS process
(Gametes) (somatic or all other cells)
Asexual ReproductionOne parent cell identical clones
1) Binary Fission
2) Fragmentation
3) Budding
Reproductive Strategies
• Number of offspring per birth:
–Offspring = “babies” (but not correct term)
Reproductive Strategies
• Reproductive structures:
–Sexual = ovary, ova/ovum, testes, sperm, DNA
–Asexual =genetic material
Reproductive Strategies
• Sexual maturity:
– The age at which the
organism is old enough to
mate, because his/her
reproductive organs are
fully developed
Reproductive Strategies
• Lifespan:
–How long the organism lives for
• Gestation period:
–The incubation time for growth and development of the embryo
Reproductive Strategies
• Mating behaviors:
– Rituals or activities the organism engages in to attract a mate (there are a variety)
Why is this important?
(Think biological continuity!)
Hormones • Male:
– Testosterone
• Female:– Estrogen– Progesterone
– Ova matures and released from ovaries on monthly cycle