The reproductive cycle rex


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The reproductive cycle rex

  1. 1. THE REPRODUCTIVE CYCLE Rex S. Jardeleza MAEd – Biological Sciences
  2. 2. The Mammal Reproductive Cycle
  3. 3. ZYGOTE • a diploid cell resulting from the fusion of two haploid gametes; a fertilized ovum. MORULLA • a solid ball of cells resulting from division of a fertilized ovum, and from which a blastula is formed. BLASTOCYST • a mammalian blastula in which some differentiation of cells has occurred. EMBRYO • an unborn or unhatched offspring in the process of development. FETUS • an unborn offspring of a mammal, in particular an unborn human baby more than eight weeks after conception. NEONATE • a baby from birth to four week
  4. 4. The Bird Reproductive Cycle
  5. 5. The Amphibian Reproductive Cycle
  6. 6. The Amphibian Reproductive Cycle A jelly-like eggs are laid in water, hatch into legless tadpoles with gills, the tadpoles grow one set of legs, then they metamorphose into an airbreathing froglet with a tail. Froglets lose their tails as they grow into adult frogs. A lot of amphibians lay their eggs out of water, finding interesting ways to keep their eggs and tadpoles wet.
  7. 7. The Insect Reproductive Cycle
  8. 8. EGG: unborn stage. LARVA: the active immature form of an insect, esp. one that differs greatly from the adult and forms the stage between egg and pupa, e.g., a caterpillar or grub. PUPA: an insect in its inactive immature form between larva and adult, e.g., a chrysalis. ADULT: final, breeding stage (they usually grow wings)
  9. 9. The Fish Reproductive Cycle
  10. 10. The Plant Reproductive Cycle
  11. 11. Asexual Reproduction • Asexual reproduction is natural “cloning.” Parts of the plant, such as leaves or stems, produce roots and become an independent plant. Sexual Reproduction • Sexual reproduction requires fusion of male cells in the pollen grain with female cells in the ovule.
  12. 12. Terms to know: • Haploid: having a single set of chromosomes in each cell. • Diploid: having two sets of chromosomes in each cell. • Mitosis: cell division, which produces two genetically identical cells. • Meiosis: reduction division, which produces four haploid reproductive cells.
  13. 13. Plant Life Cycle Alternation of Generations • Plants have a double life cycle with two distinct forms: – Sporophyte: diploid, produce haploid spores by meiosis. – Gametophyte: haploid, produce gametes by mitosis.
  14. 14. Non-flowering plants Mosses, ferns, and related plants have motile, swimming sperm.
  15. 15. Parts of the Flower
  16. 16. Incomplete flowers • Flowers are complete if they have all parts, and perfect if they have both male and female parts. • Grass flowers: incomplete, usually imperfect (separate male and female flowers) • A tulip is complete (though the sepals are the same color as the petals) and perfect.
  17. 17. Angiosperm Life Cycle
  18. 18. Double Fertilization
  19. 19. Flower to Fruit
  20. 20. Seed Anatomy
  21. 21. Seed Germination
  22. 22. Thank You for Listening