Multicellular organisms grow by increasing the number of cells they have; this involves cell division.

An organism that consists of only one cell.

The process by which cells replicate to produce two genetically identical cells.

Growth in multicellular organisms

Biology

The cell cycle and cell division: mitosis

The structure of DNA: including nucleotides

Errors in cell division and cancer: basics

Making gametes: meiosis

Pupils will learn about unspecialised cells in animals and plants, how they become specialised, and potential benefits and issues with using stem cells in medicine. 

Pupils learned about dominant and recessive alleles, and how to use models of single gene inheritance to make predictions about the genotypes and phenotypes of offspring.

This unit covers mitosis and the cell cycle in growth, cancer as uncontrolled cell division, and the role of mutations in genetic variation. It explains meiosis in gamete formation and chromosome reduction. The emphasis is on recording observations and interpreting patterns to draw conclusions.

Cell division: mitosis and meiosis

The process by which cells divide; this involves a specific set of phases.

A type of cell division that produces genetically identical cells.

A sub-cellular structure that contains the genetic material (DNA); controls the cell activities.

Tightly coiled strands of DNA that carry the genetic material.

A polymer with a double helix structure that carries the genetic information.

Bases form pairs with one other base: A pairs with T, and C pairs with G.

Short sections of DNA that code for a specific characteristic or protein.

A mass of cells that has been produced through uncontrolled cell division.

A tumour that is non-cancerous and contained to one area.

A tumour that is cancerous and can spread.

A type of reproduction that combines the genetic material of two organisms to produce genetically different offspring.

An organism's sex cells that contain half the number of chromosomes.

A type of cell division that forms the gametes.

Highly coiled strands of DNA found inside the nucleus of eukaryotic cells.

A cell with half the number of chromosomes.

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Cell division: mitosis and meiosis

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