What are genes and chromosomes?

What are genes and chromosomes?

Genes are segments of deoxyribonucleic acid (DNA) that contain the code for a specific protein that functions in one or more types of cells in the body. Chromosomes are structures within cells that contain a person’s genes. Genes are contained in chromosomes, which are in the cell nucleus.

What are chromosomes GCSE biology?

Chromosomes are thin strands of DNA (deoxyribonucleic acid). They are subdivided into genes . In most cells, chromosomes are located in functional pairs in the nucleus . Humans have 46 chromosomes arranged in 23 pairs.

What is a gene GCSE Bitesize?

A gene is a small section of DNA on a chromosome that codes for a particular sequence of amino acids, to make a specific protein. It is the unit of heredity, and may be copied and passed on to the next generation.

What is a gene GCSE science?

A gene is a small section of DNA on a chromosome, that code for a particular sequence of amino acids, to make a specific protein.

What are chromosomes ks3?

The chromosomes are found in the nucleus of each cell. Human body cells each contain 23 pairs of chromosomes, half of which are from each parent. So, human gametes (eggs and sperm) each contain 23 chromosomes. When an egg is fertilised by a sperm, it becomes a cell with 23 pairs of chromosomes.

Why are chromosomes found in pairs GCSE?

In humans there are 23 pairs of chromosomes. The reason the chromosomes are in pairs is because one set of chromosomes comes from the female parent via the egg and the other set of chromosomes comes from the male parent by way of the sperm.

Why are chromosomes in pairs GCSE?

These can be arranged into 23 pairs. Each chromosome in a pair carries the same types of genes.

What are genes ks2?

Genes carry the information that determines your traits (say: trates), which are features or characteristics that are passed on to you — or inherited — from your parents. Each cell in the human body contains about 25,000 to 35,000 genes.

What are chromosomes biology?

(KROH-muh-some) A structure found inside the nucleus of a cell. A chromosome is made up of proteins and DNA organized into genes. Each cell normally contains 23 pairs of chromosomes.

What are different forms of gene called GCSE?

Each gene might have different forms, and these are called alleles.