GCSE Biology - DNA Part 1 | Chromosomes & Genome

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*** WHAT'S COVERED ***
1. DNA and Chromosomes
* Definition and double helix structure of DNA (Deoxyribonucleic Acid).
* How long strands of DNA are coiled up to form structures called chromosomes.
* The number of chromosomes in human body cells (46 chromosomes, arranged in 23 pairs).
* How sex is determined by the 23rd chromosome pair (XX for female, XY for male).
* The appearance of chromosomes before cell division.
2. Genes
* Definition of a gene as a small section of DNA on a chromosome.
* How each gene codes for a particular sequence of amino acids to make a specific protein.
* The link between proteins produced and the type/function of a cell.
3. Genomes
* Definition of a genome as the entire genetic material of an organism.
* The importance of understanding the human genome.
* Applications including identifying genes linked to inherited diseases or disease risk, and understanding human evolution and migration.

*** CHAPTERS ***
0:00 Introduction
0:23 What is DNA?
0:48 Chromosomes
1:44 Sex Chromosomes
2:05 Chromosome Structure
2:28 What is a Gene?
3:31 What is a Genome?
4:02 Applications of Genome Sequencing

*** PLAYLISTS ***










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