types of reproduction
DESCRIPTION
Types of Reproduction. Asexual Sexual. Heredity Table of Contents. 7.4.1 Notes Asexual Reproduction Tree Map. SPI 7.4.1—Classify methods of reproduction as sexual or asexual. Purpose of Reproduction. To make sure a species can continue. - PowerPoint PPT PresentationTRANSCRIPT
Types of Reproduction
Asexual
Sexual
Heredity Table of Contents
• 7.4.1 Notes
• Asexual Reproduction Tree Map
• SPI 7.4.1—Classify methods of reproduction as sexual or asexual
Purpose of Reproduction
• To make sure a species can continue.– Definition: Reproduction is the process by
which an organism produces others of its same kind.
Asexual Reproduction
• A new organism (sometimes more than one) is produced from one organism.
• The offspring will have hereditary material uniform with the hereditary material of the parent organism. (The offspring will be genetically the same as the parent)
Types of Asexual Reproduction
• Budding
• Regeneration or Fragmentation
• Fission (Binary fission)
• Spores
• Vegetative Propagation
Budding
• Process by which a new, duplicate plant or animal begins to form at the side of the parent and enlarges until an individual is created.
http://www.waycross.edu/faculty/bmajdi/hydra%20budding.jpg
Hydra
http://judyepstein.com/images/DesertImages/Budding-Purple-LG.jpg
Cacti
Regeneration or Fragmentation
• The ability to restore lost or damaged tissues, organs or limbs.
• It is a common feature in invertebrates, like worms and starfish.
http://www.vsf.cape.com/~jdale/science/starfishregenerating.jpg
Starfish
http://classes.design.ucla.edu/Spring05/152BC/projects/saito/ex3/planaria.jpg
Planarians
Fission
• Also called binary fission.
• Becoming two by division of the complete organism.
• A type of cell division.
http://wappingersschools.org/RCK/staff/teacherhp/johnson/visualvocab/BinaryFissionParamecium.jpg
Paramecium
http://coris.noaa.gov/glossary/binary_fission_186.jpg
Bacteria
Spores
• A reproductive cell capable of developing into a new individual without fusion with another reproductive cell
• Found in mold, fungi, and ferns
Mold
Puffball
Ferns
Vegetative Propagation
• A process which doesn’t involve a seed to produce new plants.
• Examples: runners, bulbs, cuttings, grafting
Bulbs
Cuttings
Grafting
Runners
Sexual Reproduction
• Requires two sex cells – egg and sperm
• The egg and sperm join to form an entirely new organism– Different from the parent organism
Flowering plants
Seeds
Eggs
Fish eggs
Frog eggs
Baby hedgehogs
Baby animals
Human babies
IMPORTANT!
• Asexual reproduction results in offspring that are genetically identical to the parent organism
• Sexual reproduction results in offspring that are genetically different from the parent organisms
Sexual versus Asexual Reproduction
Type of Reproduction Advantages Disadvantages
Sexual
Diversity in offspring
Offspring less likely to have mutations show up
Requires a mate to reproduce
Population increases are limited
Asexual
Can increase populations rapidly
Does not require a mate for reproduction to take place
Lack of diversity in offspring
Because they reproduce offspring genetically identical to parents, the offspring inherit any mutations of the parent.
Exit Slip
• Describe the difference between asexual and sexual reproduction.