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Asexual vs Sexual Reproduction I can… Describe types of asexual and sexual reproduction Compare asexual and sexual reproduction Reproduction The process by which organisms produce more of their own kind Allows living things to pass on their traits to offspring - Think about it – Without reproduction, all life on earth would no longer exist. Types of Reproduction SEXUAL Two parents Offspring genetically different than parent ASEXUAL One parent Offspring identical to parent (clones) Vegetative reproduction ASEXUAL Reproduction CON If environment changes, will not be adapted PRO Easy, fast Only one “parent” needed Types of Asexual Reproduction Binary fission Budding Spores Vegetative growth Binary Fission occurs in one-celled organisms DNA gets copied cytoplasm divides in half 2 new identical daughter cells of equal size Ex. Ameoba, Paramecium Budding DNA gets copied Little bud forms Cytoplasm divides One daughter cell is larger than the other Ex. Hydra, yeast Animation (.flv) Vegetative Growth Occurs only in plants New plants grow from the roots, stems, or leaves of the parent plant. Ex. Spider plant, strawberry runners Spores Zoospores released in large numbers Surrounded by a thick coat to help them survive harsh environmental conditions Ex. Molds, moss The Cloning Controversy Pg. 29 9A – due Tuesday 9B – due Tuesday 9C – due Friday SEXUAL Reproduction TWO parents involved Offspring are genetically different to their parents Sperm and egg (gametes) come together Fertilized egg is called a zygote Sexual Reproduction PRO Genetic diversity in offspring CON More “difficult”: Time 2 individuals Types of Sexual Reproduction Zygospores Bacterial Conjugation Flowering Plants (angiosperms) Animals Angiosperms (Flowering Plants) Pollen (sperm cell) Ovule (egg cell) Pollen tube Zygospores Some plants reproduce sexually using zygospores Ex. Mosses, molds Bacterial Conjugation Bacteria transfer genetic material DNA travels through tube connection ***No new cell is produced – only new genetic information in cell Bacterial Conjugation (animations) Animals (animation) Gametes come together to form zygote DNA is combined ***What is a gamete? Gametes Gamete is a haploid cell (meaning a cell with only half the genetic information) Sperm cell is a gamete What other cell is an example of a gamete? 8 celled zygote Learning Check: Identify the type of reproduction in each A._______________ B._______________ C._______________ D._______________ Types of Reproduction SEXUAL Two parents Offspring genetically different than parent ASEXUAL One parent Offspring identical to parent (clones) Vegetative reproduction ASEXUAL Reproduction CON If environment changes, will not be adapted PRO Easy, fast Only one “parent” needed SEXUAL Reproduction TWO parents involved Offspring are genetically different to their parents Sperm and egg (gametes) come together Fertilized egg is called a zygote Sexual Reproduction PRO Genetic diversity in offspring CON More “difficult”: Time 2 individuals Types of Asexual Reproduction Binary fission Budding Spores Vegetative growth Types of Sexual Reproduction Zoospores/Zygospores Bacterial Conjugation Flowering Plants Animals