Download YEAR 7 SCIENCE HOMEWORK /YOU ARE A SCIENTIST 1

YEAR 10 SCIENCE HOMEWORK – 3 / EVOLUTION
Cell Division
Cell division is the process by which cells multiply during the growth of tissue or organs. The type
of cell division involved in the growth, repair and replacement of the body is called mitosis. The
cell division which produces the reproductive cells is called meiosis.
The number of chromosomes in each body cell is called the diploid number. In normal body cells
chromosomes occur in pairs.
The process of mitosis ensures that new body cells have the same number of chromosomes as their
parent cell to possess all the necessary coding instructions.
Meiosis is the kind of nuclear division that prevents the doubling of the number of chromosomes
at fertilisation.
Chromosomes carried in the sperm from the father are called paternal. The chromosomes in the
ovum from the mother are called maternal.
Write all answers in full sentences.
1. Define the word: cell division.
2. What is mitosis?
3. Define the word: paternal.
4. Define the word: maternal.
5. What is the diploid number?
 QUIZ- Write true or false next to each statement
1. Cell division helps in the growth and repair of tissues__________
2. Meiosis happens in reproductive cells ____________
3. Paternal genes come from your father’s side _____________
4. Cell division is important to make new cells______________
5. During cell division, the DNA molecule makes an exact copy of itself ______________
Paste this homework sheet in your science book.