Transcript Types of Reproduction

Types of Reproduction
Asexual
Sexual
Background….
• Heredity-The transmission of genetic
information (through DNA) from parents to
offspring
• Genetics- The science of heredity, dealing
with resemblances (likeness) and
differences of related organisms.
Purpose of Reproduction
• Why do organisms reproduce?
• To make sure a species can continue.
Definition: Reproduction is the process
by which an organism produces others
of its same kind.
(OFFSPRING)
Asexual Reproduction
• A new organism (sometimes more than
one) is produced from one organism.
• The offspring will have genetic material
uniform with the genetic material of the
parent organism. This means they will be
genetically alike.
Types of Asexual Reproduction
• Budding
• Regeneration
• Fission (Binary fission)
Budding
• Duplicate plant or animal begins to form at
the side of the parent and enlarges until an
individual is created.
• Very common in plants
http://www.waycross.edu/faculty/bmajdi/hydra%20budding.jpg
http://judyepstein.com/images/DesertImages/Budding-Purple-LG.jpg
Regeneration
• The ability to restore a full organism
lost or damaged tissues, organs or
limbs.
(Common feature in invertebrates, like
worms and starfish.)
http://www.vsf.cape.com/~jdale/science/starfishregenerating.jpg
http://classes.design.ucla.edu/Spring05/152BC/projects/saito/ex3/planaria.jpg
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
http://coris.noaa.gov/glossary/binary_fission_186.jpg
Sexual Reproduction
• Requires two sex cells – egg and sperm
-Found in humans and larger mammals
• The egg and sperm join to form an entirely
new organism
– Different from the parent organism BUT
having genetic information from both parents
IMPORTANT TO KNOW!
• Asexual reproduction results in offspring
that are genetically identical to the parent
organism (exactly the same)
• Sexual reproduction results in offspring
that are genetically different from the
parent organisms (like characteristics).
-This allows for DIVERSITY
Sexual Reproduction
+
DAY 2….Genes,
Dominance, and
Inheritance
Mendel ' s Theory of Inheritance
• The focus of genetic research shifted to
understanding what really happens in the
transmission of hereditary traits from
parents to children.
DAY 2….
Punnett Square
• Characteristic-Eye Color
B
• BB-Homozygous for Blue
Eyes
b
• bb-Homozygous for
Brown Eyes
b
• How many offspring have
BLUE eyes?
B
Punnett Square
• Characteristic-Eye Color
B
• BB-Homozygous for Blue
Eyes
b
• bb-Homozygous for
Brown Eyes
b
• How many offspring have
BLUE eyes?
Bb
B
Punnett Square
• Characteristic-Eye Color
B
• BB-Homozygous for Blue
Eyes
b
• bb-Homozygous for
Brown Eyes
b
• How many offspring have
BLUE eyes?
Bb
B
Bb
Punnett Square
• Characteristic-Eye Color
B
• BB-Homozygous for Blue
Eyes
b
• bb-Homozygous for
Brown Eyes
Bb
b
• How many offspring have
BLUE eyes?
Bb
B
Bb
Punnett Square
• Characteristic-Eye Color
B
• BB-Homozygous for Blue
Eyes
b
Bb
B
Bb
• bb-Homozygous for
Brown Eyes
b
• How many offspring have
BLUE eyes?
Bb
Bb
Punnett Square
• How many offspring have BLUE eyes?
ALL FOUR!
• Do any offspring carry the gene for brown
eyes?
CLONING
THE FACTS….
•Cloning in biology is the process of producing similar populations of genetically
identical individuals that occurs in nature when organisms such as bacteria,
insects or plants reproduce asexually.
•The possibility of human cloning, raised when Scottish scientists at the Roslin
Institute created the much-celebrated sheep "Dolly“.
1996-2003
Now on display in Scotland
Writing Assignment
Write a FULL response to the following
question
• If scientists were able to clone Dolly, they could
soon want to clone humans. What are your
views on cloning? What could cloning mean for
the future?
• In your response includeMedical Advantages & Disadvantages
Ethical Concerns (is this right or wrong & why)
Possible Problems