Transcript asexual v. sexual reproduction - Hicksville Public Schools / Homepage

LO: SWBAT explain the difference
between asexual and sexual
reproduction and describe different
types of asexual reproduction
DN: Explain the differences between
sexual and sexual reproduction
HW: Vocabulary: chromosomes,
asexual reproduction, sexual
reproduction, binary fission,
regeneration, budding, sporulation,
vegetative propagation
Who thinks they can define
Reproduction?
The process by which living things produce
other living things like themselves.
The production of offspring.
What are Chromosomes?
Found in Nucleus
XX
XX
• found in the nucleus
•determine our physical
characteristics
•Made of DNA
•Instructions of cell
•Passed on to offspring
cell
Types of Reproduction:
Asexual Reproduction
XX
XX
Parent
XX
XX
XX
XX
Clones
Offspring
Clones
Genetic Information
(Chromosomes)
1) the creation of a new individual from
only 1 parent.
2)Genetic information of offspring is
identical to the parent.
Do the cells in our body undergo
asexual reproduction?
Yes- mitosis
When do the cells of our
body undergo Asexual
Reproduction?
Growth
Repair
1. BINARY FISSION
The splitting of a one-celled organism
into 2 equal halves.
Example: Bacteria & Ameba
2. Regeneration
The ability of organisms
to grow back limbs if
they are cut off.
• If cut into 2 pieces each piece will be a
new offspring.
• Will they be identical?
3. Budding:
• a new cell is formed from a tiny bud
on the parent cell
• Parent large and offspring small
• Example: hydra & yeast
Sporulation
• Each spore (plant offspring) is a clone
• mold
Vegetative Propagation
When roots, stems
and leaves give rise
to a new
plant
Types of Vegetative Propagation:
Natural:
1)Runners
2)Bulbs
3)Tubers
4)Rhizomes
Artificial:
1)Cuttings
2)Grafting
Runners
Offspring grow from one parent
plant
Are they identical to parent plant?
Bulbs
Underground stem with fleshy
leaves which store food
Tuber
Underground stem enlarged
for storage of food
Rhizomes
•Stems that grow sideways
underground.
•New plants can grow from these
stems.
Cuttings
Vegetative part of a
plant is cut, and it can
develop into a new
plant.
Root Growth
Grafting
A cutting from one plant (scion) is
attached to the main body of a rooted
plant (stock).
What is Sexual Reproduction?
the joining of two
cells to begin the
development of a
new individual.
These called: special cells are Sex
Cells (Gametes)
Sexual Reproduction
XX
+
XX
XX
XX
Offspring
Egg
A fertilized egg cell is called
Sperm
a Zygote
1) Is the creation of a new individual
from 2 parents.
2) Offspring are not genetically identical
to the parents.
What are the names of these sex
cells?
Egg cell (Female)
Sperm Cell (Male)
The joining of a sperm cell
with an egg cell is called
fertilization.
We get half our genetic
information from mom and half
our genetic information from
dad
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Males:
Sperm cells
Females:
Egg cells
Asexual vs.
Sexual Reproduction
1 Parent
Offspring are
identical
Produce 2 Parents
Offspring
Offspring are
Critical for
not
identical
survival
of the species
Bacteria, Ameba,
Humans,
Body Cells
Dogs, Plants
Asexual Reproduction
Sexual Reproduction