Lampbrush chromosomes, TEM

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Lampbrush chromosomes, TEM

Lampbrush chromosomes. Coloured transmission electron micrograph (TEM) of lampbrush chromosomes (LBCs). A chromosome consists of proteins and DNA (deoxyribonucleic acid). DNA contains sections (genes) that encode the cells structure and function. LBCs are found inside amphibian and bird oocytes (immature egg cells). They are known as giant (polytene) chromosomes, as they undergo repeated replications of DNA without nuclear divisions, creating elongated strands. These strands consist of a main axis, around which there are many brush-like loops. These loops allows the genes to be easily transcribed (processed) while the oocyte develops into a mature ovum (egg). LBCs are ideal models for exploring how chromosomes function due to their large size and open structure

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Media ID 6453739

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Active Amphibian Animal Body Bird Cell Biology Cell Division Chromatin Chromosomal Chromosomes Developing Development False Colour Gamete Genetic Material Giant Chromosome Histones Loop Looped Looping Loops Maturation Maturing Micrograph Nucleus Oocyte Oocytes Ovum Polytene Proteins Replication Transcription Transmission Electron Transmission Electron Microscope Animal Cells Bio Chemistry Biochemical Deoxyribonucleic Acid False Coloured Genetics

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