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Making Gametes
Chimpanzees have 48 chromosomes in each body cell - humans have 46.

Making Gametes

This Biology quiz is called 'Making Gametes' and it has been written by teachers to help you if you are studying the subject at middle school. Playing educational quizzes is a fabulous way to learn if you are in the 6th, 7th or 8th grade - aged 11 to 14.

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Cell division is one of the processes studied in middle school Biology. This quiz focuses on one particular type, meiosis, which is used in the making of gametes. Gametes are the female and male sex cells - eggs and sperm. The gametes are made in the ovary and testes by a special type of reduction cell division called meiosis.

1.
Human body cells contain how many chromosomes?
One
Two
46
23
Different species have different chromosome numbers. For example, chimpanzees have 48 chromosomes in each body cell
2.
Variation takes place as a result of meiosis and is a big advantage of which type of reproduction?
Asexual
Conjugation
Sexual
Replication
If every organism was identical to every other organism of the same species, it is possible that disease or a change in the environment would cause extinction
3.
Meiosis results in cells which are genetically...
identical
different
mutated
the same
It is for that reason that variation of inherited features occurs.
4.
Meiosis results in how many gametes?
One
Two
Three
Four
In the first stages of meiosis, chromosomes make copies of themselves so (in humans) there are a total of 4 sets of chromosomes in the cell. These then separate, during two sets of cell division, into unpaired chromosomes so meiosis therefore creates 4 gametes.
5.
Name the process by which the normal chromosome number is restored.
Mitosis
Meiosis
Cloning
Fertilisation
At fertilization, an egg containing 23 single chromosomes joins with the sperm also containing 23 single chromosomes to form a zygote with 46 chromosomes (23 pairs)
6.
Mitosis produces cells which are genetically...
different
identical
varied
mutated
This is the type of cell division that occurs to produce cells with the full number of chromosomes
7.
Inside gametes, chromosomes are...
paired
single
absent
reduced
Before genetics and cell division was understood, scientists were completely puzzled about what made gametes different to other cells
8.
Human gametes (eggs or sperm) contain how many chromosomes?
One
Two
23
46
Each gamete contains half of the genetic material of the new individual
9.
At the start of meiosis, what is replicated?
DNA
Enzymes
Cells
Gametes
Before any cell can divide, the chromosomes replicate and make an extra copy of the DNA. This maintains the chromosome number for the species. One arm of each chromosome duplicates an exact copy forming an X-shaped structure
10.
Meiosis consists of how many cell divisions?
One
Two
Three
Four
This type of cell division forms cells with only half of the genetic information
Author:  Donna Maria Davidson

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