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ainara hidalgo

on 30 October 2013

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Transcript of Mitosis

Mitosis by: Ainara Hidalgo and fadha alsaidi
The phase of a cell life where the cell prepared for mitosis, let me explain a little bit more of Interphase , the DNA replicates but has not formed the condensed structure of Chromosomes they remain as loosly coiled Chromatin, the Nuclear Membrane Is still intact to protect the DNA molecules from undergoing Mutation

Not part of Mitosis
mitosis cell cycle
This is the cycle of Mitosis let me explain ,

What is mitosis?
Mitosis Is the phase of the cell cycle were Chromosome In the nucleus are evenly divided between two cells when the cell division process Is complete two Daughter cells with identical Genetic materials are produced.
Also known as cell division
A form of Asexual reproduction
create two cells with identical DNA to the DNA to the Parent cell
no genetic variation in Offspring
Prophase is the first actual step of mitosis, The DNA molecules progressively shorten and condense by coiling, to form chromosomes. the nuclear membrane and nucleolus are no longer visible.

two small structure called centrioles move to opposite side of the cell.
the spindle fibres attached themself to the centromeres of the chromosomes and align the chromosome at the equatorial plate
The spindel fibres shorten at the centromere splits, seperated, sister chromatids are pulled along behind the centromeres
Telophase Is one of the last steps of mitosis, it's when the chromosomes reach the poles of their respective spindle. And the nuclear envelope reform before the chromosome uncoil the spindle fibres disintegrate

Cytokinesis is the final step to mitosis, it is the part were the daughter cells split apart and each daughter cell contains the same number of chromosomes .
Interesting vocabulary

Chromatin: the readily stainable substance of a cell nucleus, consisting of DNA, RNA and various protein that form chromosome during cell division.

Nuceolus: A conspicuous, rounded body within the nucleus of a cell.

Centromere: A specialized structure on the chromosome, appearing during cell division as the constucted central region were the two chromatids are held together form and x shape.

Daughter cells: either of two cells formed when a cell undergoes cell division by mitosis, daughter cells are genetically Identical to the parent cell because they contain thesame number and type of chromosome.

Chromosome: Any of the several threadlike bodies, consisting of chromatin, that carry the genes in a linear order, the human specicies has 23 pairs, designated 1to 22 in order of decreasing size and x and y for the female and male sex chromosome respectivly.

Genetics: The science of heredity, dealing with resemblances and differences of related organism resulting from the interaction of their genes and their enviroment.

Mitosis: the usual method of a cell division, characterized typically by the resolving of the chromatin of the nucleus into a thread like form, which condenced into chromosomes, each of wich separate longitudinally into two parts, one part of ecah chromosome being retained in each of two new cells resulting from the original cell.

DNA: Is a molecule that encode the genetic instruction used in the development and functioning of all known living organism and many viruses.

Parent cells: A cell that is the source of other cells that divide to produce two or more daughter cells or a sterm all that is a progenitor of other cell or is the first in a line developing cell, also called mother cells.

Offspring: Thee product of the reproductive process of an animal or plant

Phosphase: First stage cell division, before metaphase

Sister chromatids: are generated when a single chromosome is replicated into two copies of itself
More..... vocabulary
Assexual reproduction: Is a mode of reproduction by which offsprings a rrise from a single parent,and inherit the genes of that parent only.

Interphase: the period of the cell cycle during which the nucleus is not undergoing division, typically, occuring between mitosis or meiosis division.

Mutation: A sudden departure from the parent type in one or more heritable characteristics, caused by a change in gene of chromosome

Nuclear membrane: is the double lipid bilayer membrane which sorrounds the genetic material and nucleolus in eukaryotic cells.

centrioles: is a cylindrical cell structure composed mainly of tubulin that is found in most eukaryotic cells.

spindle fibres: aggregates of microtubules that move chromosomes during cell division.

Centromeres: a part of chromosomes that link sister chromatids during mitosis.

Anaphase: the paired chromosomes separate

Metaphase: the spindle fully develops and the chromosomes align at the metaphase plate.

Telophase: during which the chromosomes of daughter cells are grouped into a new nuclei.

cytokinesis: cytoplasm of a single eukaryotic is divided into two daughter cells.

Dominant: most inportant, powerful, or influential

Recessive: relating or denoting heritable characteristic controlled by genes that are expressed in offspring from both parents
Twins are so cute and adorable making me want to see one wants me to take their cheeks,but have you ever wondered how they are made let me explain how, first one egg is fertilized , next the fertilized egg divides in to two parts and seperate and develop independently, finally the two babies have identical chromosomes and genes. And finally the twins are made.
OOH! Twins

Let me show you a video on how twins are made
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