Define gene.

Define allele.

Define inheritance.

Where in a cell are chromosomes found?

What does a gene code for?

The nucleus of a gamete is      and contains half the number of chromosomes of a body cell.

In humans, a haploid gamete nucleus contains    chromosomes.

How many chromosomes are found in a human diploid cell?

True or False? A diploid cell has two copies of each chromosome.

True or False? Alleles are the structures that carry chromosomes.

Define meiosis.

Define haploid.

Define reduction division.

Why must the chromosome number be halved when gametes are made?

How many daughter cells does meiosis produce, and what type are they?

What type of cells does meiosis produce?

How does meiosis increase genetic variation?

Meiosis produces daughter cells that are genetically       from one another.

True or False? Gametes are haploid cells.

Define mitosis.

Define diploid.

Define stem cell.

Why do chromosomes copy themselves before mitosis?

Give three roles of mitosis in organisms.

What happens to the chromosomes during mitosis?

Mitosis produces two daughter cells that are genetically       to each other and to the parent cell.

The ultimate stem cell is the     , which divides to form a ball of embryonic stem cells.

True or False? Mitosis produces cells that are genetically identical to the parent cell.

True or False? Gametes are produced by mitosis.

Why are stem cells important in the body?

Define tumour.

Define mutation.

What causes cancer?

Why do healthy cells divide only when needed?

How can uncontrolled cell division form a tumour?

By which type of cell division do body cells divide for growth and repair?

Cancer results from a loss of control of the       , causing uncontrolled cell division.

A mass of cells produced by uncontrolled cell division is called a     .

True or False? Cancer is caused by uncontrolled cell division.

True or False? Tumours form when the cell cycle is too tightly controlled.