Transcript
THE REPRODUCTIVE CYCLERex S. JardelezaMAEd – Biological Sciences
The Mammal Reproductive Cycle
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
The Bird Reproductive Cycle
The Amphibian Reproductive Cycle
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 air-breathing 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.
The Insect Reproductive Cycle
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)
The Fish Reproductive Cycle
The Plant Reproductive Cycle
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.
• 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.
Terms to know:
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.
Non-flowering plants
Mosses, ferns, and related plants have motile, swimming sperm.
Parts of the Flower
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.
Angiosperm Life Cycle
Double Fertilization
Flower to Fruit
Seed Anatomy
Seed Germination
The Miracle of Life
Thank You for Listening
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