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Unit 2 - Mitosis
Plants can reproduce by asexual reproduction. All the new plants are identical.

Unit 2 - Mitosis

Cell division is one of the processes studied in GCSE Biology. This quiz focuses on the main type of cell division, mitosis, which is used by the body for growth and repair.

Mitosis takes place when plants or animals need to make new cells for growth or repair. The genetic code for an organism is carried by the chromosomes in the nucleus of every cell. Mitosis is a type of cell division where a body cell divides to form two genetically identical cells. Each body cell keeps the same number of chromosomes as the original cell. In humans, each body cell has 23 pairs of chromosomes or 46 chromosomes in total. At the end of mitosis, each daughter cell also has 46 chromosomes identical to the originals. Other organisms have different numbers of chromosomes e.g. most species of cat have 38 chromosomes and horses have 64.

1.
Which structures pull the chromosomes apart during cell division?
Poles
Membranes
Spindle fibres
Nuclei
Each chromosome is attached to a fibre which acts like a rope pulling and splitting each chromosome into 2 halves. They are identical copies of each other and move to opposite ends of the dividing cell
2.
In humans, there are 46 chromosomes inside the nucleus of body cells. How many chromosomes are present in cells after mitosis?
23
46
47
24
Remember, mitosis produces daughter cells that are genetically identical to the parent cell therefore the number of chromosomes must be the same
3.
Before the cell can divide, what must it copy?
Its nucleus
Its DNA
Its hormones
Its bacteria
Chromosomes are made from strands of DNA
4.
Which type of cell division makes sex cells: eggs and sperm?
Mitosis
Cloning
Asexual
Meiosis
This produces cells with only half of the genetic information of the original cell
5.
Mitosis produces new cells for...
growth and repair
the sake of it
making gametes
reproduction and excretion
In different species, new cells formed by mitosis can be used for regrowing lost body parts and it also allows asexual reproduction to take place
6.
During mitosis, a cell divides to form how many cells?
1
2
3
4
The two new cells are referred to as daughter cells
7.
Body cells have 2 sets of chromosomes found in pairs but gametes have how many sets?
1
2
3
4
Gametes, eggs and sperm, have half the number of chromosomes which are unpaired. This means there is one set of chromosomes and not two. This is due to the halving of the chromosome number which happens when gametes are made
8.
Mitosis results in cells which are...
different
larger
varied
identical
Mitosis creates cells that are genetically identical to the original cell
9.
Plants can reproduce by asexual reproduction. All the new plants are...
identical
different
smaller
varied
Individuals that are identical genetically to the parent organism are called clones
10.
In which of the following is mitosis most likely to take place?
A virus
Plant roots
A nucleus
Dead cells
Mitosis takes place in any living animal and plants cells which are undergoing growth and repair
You can find more about this topic by visiting BBC Bitesize - Cell division

Author:  Donna Maria Davidson

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