asexual reproduction asexual – the production of a new organism with out the fusion of sex cells....
TRANSCRIPT
Asexual ReproductionAsexual – the production of a new organism with out the fusion of sex cells. ONE parent is involved.
Asexual ReproductionOne parent involvedNew organism produced by mitotic cell division of parent cell
Offspring is identical to parent
Types of Asexual Reproduction1. Binary Fission
One celled organism undergoes division
Equal division of the organism Ex. Ameba, Paramecium
2. Buddinga. Unicellular: yeast
i. New cell detaches or remains on parent to form a colony
ii. Unequal division of cytoplasm
4. Regeneration – (invertebrates)a. Development of an entire new
organism from a part of the original
b. Undifferentiated cells – not specialized
c. Replacement of lost structuresEx. Starfish, planaria
5. Vegetative Propagationa. Type of asexual reproduction
that occur in plants.b. New plants develop from roots,
stems, or leaves of the parent plant
1. Natural:a. Bulbs – enlarged underground
stem with thick leaves. Ex. Onions & Tulips
b. Tubers – enlarged underground stem with buds. Ex. Potato
c. Runners – stems that grow along the ground. Ex. Strawberries
d. Rhizomes – short pieces of woody, underground stems. Ex. Ferns, poison ivy.
2. Artificial:a. Cuttings – a piece of stem or leaf is cut
from the plant and placed in soil or water a new plant develops. Ex. Geranium, rose, grape.
b. Layering – bending stems into the ground to produce new plants. Ex. Raspberry plant
c. Grafting – stem is cut from one plant and attached to stem of another plant allows for combination of desirable traits. Ex. Seedless oranges, different types of apples on one tree.
Results of Asexual Reproduction Offspring is genetically identical to the parent
Same hereditary information.
Steps Scientists take a parent cell nucleus and extract it.
Scientists take an egg cell from a female and remove the nucleus.
The nucleus from the parent cell is put into the egg cell.
The egg cell can then be implanted into a female for full development.