Exercise 7 : Cell Division
Terms in this set (44)
Prokaryotic cells reproduce through
Binary fission is where
One cell divides into two cells which are genetically identical
Eukaryotic cells divide by
Mitosis and cytokinesis
Division of the nucleus
Division of the cytoplasm
The rule of mitosis and cytokinesis is to make more cells that are
Genetically identical to the original parent cell
What are the three purposes of mitosis and cytokinesis?
Repairing of tissues, growth, reproduction
The cell cycle is the lifecycle of a cell of which
Mitosis is a part
The two main categories of the cell cycle are
Interphase and mitosis
In order for cell division to occur
The genetic material must be replicated
Interphase consists of
G1, S, G2
The cell spends 90 to 95% of its time and what phase?
Production of more cytoplasm, cell membrane, and cell organelles
DNA replication (duplication of chromosomes); each chromosome duplicates
Production of structures needed for mitosis; protein synthesis of mitotic apparatus
The cell cycle is
Cycleable recyclable; ongoing
After duplication, each chromosomes consist of
To sister chromatids which contain identical copies of DNA molecule
The two sister chromatids are joined together by a region called
I need side of the centromere is a
Connecticut or which binds to spindle microtubules during mitosis
The spindle moves the
Chromosomes during mitosis
Our sister chromatids genetically identical or different?
What do you think would happen if the centromere's lacked kinetochores?
They would not be pulled apart; the cell wouldn't divide
What are the subcategories of the mitotic phase?
Prophase, metaphase, anaphase, telophase and cytokinesis
Chromatin condenses forming chromosomes. Each duplicated chromosome appears as two identical sister chromatids joined together by a centimeter. The centrosome chromatin condenses forming chromosomes. Each duplicated chromosome appears as two identical sister chromatids joined together by a centromere. The mitotic spindle begins to form as microtubules grow out from the centrosomes. The nuclear membrane disappears.
Microtubule - organizing center
Spindle microtubules attached to the kinetochores of the centromeres. Chromosomes are moved toward and lined up at the equator of the cell
Centromere's divide and the sister chromatids of each duplicated chromosomes separate and are moved to opposite poles of the cell. It's sister chromatid is now considered an unduplicated chromosome.
Chromosomes reach opposite ends of the cell. Daughter nuclei appear as nucleus envelopes form. The mitotic spindle disappears. Cytokinesis occurs forming to genetically identical cells.
Cytokinesis usually occurs along with
Mitosis, but this is not always the case. It usually occurs during telophase.
In the plant cells, cytokinesis involves formation of a
In animals, cytokinesis involves the formation of a
What cell structure found in plant cells but not animal cells would account for the differences and cytokinesis between plants and animal cells?
A cell wall.
What happens when a cell undergoes mitosis but not cytokinesis?
The result is one cell membrane with many nuclei. A continuous cell membrane. Slime mold.
A human somatic cell possesses how many chromosomes before mitosis?
How many chromosomes with each body sell possess after mitosis and cytokinesis?
Would cells resulting from mitosis be genetically identical or different?
Plant possess regions of tissue called
Meristems where cell division occurs continuously.
Allium (onion) root tip
We were able to see
Individual cells containing stained chromosomes
Know how to identify each stage of
The cell cycle
In animals, the joining of the ....... Result in the formation of a
Egg cell and sperm cell; zygote
This zygote undergoes undergoes
Mitosis and cytokinesis resulting in a ball of cells called
Within the blastula,
Mitosis and cytokinesis are occurring
We examined slides of
Whitefish blastula in order to observe the stages of mitosis.