mitosis vs. meiosis division of body cells and sex cells
TRANSCRIPT
Mitosis vs. Meiosis
Division of body cells and sex cells.
Body cells have the same number of chromosomes as the parent cells (46-46)
Sex cells have half the number of chromosomes as the parent cells (46-23)
Asexual reproduction- requires only one parent cell
Sexual reproduction- requires two parent cells
Parent Cell 46
Daughter Cell 46
Daughter Cell 46
Mitosis
Meiosis Parent Cell 46
First Division
46
First Division
46
Sex Cell 23
Sex Cell 23
Sex Cell 23
Sex Cell 23
Sexual Reproduction:Female sex cells are called eggs.Male sex cells are called sperm.
Sex cells are known as haploids because they have half of the
genetic material. (Half from the egg and half from the sperm.)
Females release one egg from an ovary each month. If the egg is not
fertilized, the egg will leave the body with menstruation.
Average 28 day cycle.
Fertilization occurs with the union of the egg (23) and the sperm (23).The union creates a zygote (46 chromosomes). The zygote cell is a diploid (full number).
Who determines the sex of the offspring?
So…
XX- female
XY- male
The zygote begins to grow into an embryo by the process of mitosis or body cell division.
How do twins form?
Identical Fraternal
Identical Twins Sonogram Fraternal Twins Sonogram
Siamese Twins are identical twins that have not entirely separated.
Feature: Mitosis: Meiosis:
Beginning Cell- Body Cell Body Cell
# of cells produced- 2 4
End product cell- Body Cell Sex Cell
# of chromosomes- 46 23
Type of reproduction-
Asexual Asexual