1. UNIT 6: Reproduction
“A Zillion Ways to Make More”
Ms.Liu
Biology
2/15/12

3. Sexual Reproduction
Sperm + ovum  fertilized egg
GAMETES ZYGOTE
MEIOSIS vs. MITOSIS process
(Gametes) (somatic or all
other cells)

4. Asexual Reproduction
One parent cell  identical clones
1) Binary Fission 
2) Fragmentation 
3) Budding 

5. Reproductive Strategies
• Number of offspring per birth:
– Offspring = “babies” (but not correct
term)

6. Reproductive Strategies
• Reproductive structures:
– Sexual = ovary, ova/ovum, testes,
sperm, DNA
– Asexual =genetic material

7. Reproductive Strategies
• Sexual maturity:
– The age at which the
organism is old enough to
mate, because his/her
reproductive organs are
fully developed

8. Reproductive Strategies
• Lifespan:
– How long the organism lives for
• Gestation period:
– The incubation time for growth and
development of the embryo

9. Reproductive Strategies
• Mating behaviors:
– Rituals or activities the organism
engages in to attract a mate (there are a
variety)

10. Why is this important?
(Think biological continuity!)

11. Hormones
• Male:
– Testosterone
• Female:
– Estrogen
– Progesterone
– Ova matures and released from ovaries on
monthly cycle