GCSE Biology - DNA Part 1 | Chromosomes & Genome (2026/27 exams) скачать в хорошем качестве

GCSE Biology - DNA Part 1 | Chromosomes & Genome (2026/27 exams)

⭐️ Check out our website https://www.cognito.org/ ⭐️ ** 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 **    • GCSE Maths (9-1)      • GCSE Biology (9-1)      • GCSE Chemistry (9-1)      • GCSE Physics (9-1)      • A-Level Biology   #GCSE #Biology #study #revision #school #exam #AQA #OCR #Edexcel #IGCSE