understanding reproduction and chromosomes. cost: $179.95 rn-25-1018
DESCRIPTION
Four Activities in One Kit Activity 1: Asexually Reproducing Organisms Activity 2: Human Chromosomes and the Process of Making Karyotypes Activity 3: Using the Karyotypes to Investigate Sexual Reproduction Activity 4: Genetic DisordersTRANSCRIPT
Understanding Reproduction and Chromosomes
Four Activities in One KitActivity 1: Asexually Reproducing OrganismsActivity 2: Human Chromosomes and the
Process of Making KaryotypesActivity 3: Using the Karyotypes to
Investigate Sexual ReproductionActivity 4: Genetic Disorders
Online Onion Root TipsLink
Students should have background knowledge on chromosome structure and meiosis prior to the lab.
Activity One: The Different Forms of Asexual Reproduction
Start lesson with engaging scenarioVideoDivide into groups and assign an organism to study.Each group will be given a prepared microscope
slide of their organism and a study card.Use the microscope slide to gather information of
your organism and the mechanism in which they reproduce asexually.
Groups that were assigned the same organism to study discuss their results.
Class Discussion of all the organisms. See Table in handout.
Follow up questions to identify the key components of asexual reproduction.
Organism Picture of Organism
Type of Asexual Reproduction
Description of Asexual Reproduction
HydraSee next slide.
Budding Develops an outgrowth which is detached from the parent and becomes a new individual.
Paramecium
See next slide.
Binary Fission Paramecium cell divides into two; each cell has a nucleus with identical genes.
YeastSee next slide.
Budding Yeast cells divide in half to produce two genetically identical cells.
MossSmall green plants that grow in moist areas.
Spore formation Spores are produced that are genetically identical to parent. They can travel by wind.
Rhizopus (Mold)
See next slide.
Spore formation Spores reproduce asexually inside long tube like structure called sporangium.
Hydra Reproducing Asexually
Moss
Life Cycle of Producing Spores
Magnification of Budding Yeast
Key Points of Asexual Reproduction
Offspring are genetically identical to parents.Each parent organism transfers their genes
through the process of mitosis.Advantages:
Organism does not require another sex to pass on a full set of identical genetic traits
Faster than sexual reproductionDisadvantages
No genetic diversityPopulation of organisms lack the traits to adapt to
a changing environmental conditionsUnfavorable genes will always be passed on