Cell Biology MRS.SRIDEVI 1 Cell Biology Todays Topics

Cell Biology MRS.SRIDEVI 1 Cell Biology Todays Topics Size Components Shape Chromosome Steps Involve Basic techniques Genetic Engineering 2 Introduction

3 Chromosome -Size Ranges from 0.25 Chromosomes in plants larger than in animals Chromosomes in monocots larger than Largest chromosomes: 4 Chromosome -Shape 5

Chromosome -Number Species rice maize great millet peanut, ground nut soybean mung bean, green gram upland cotton mango cassava sugarcane Diploid Number of Chromosomes Oryza sativa 24 Zea mays

20 Sorghum vulgare 20 Botanical Name Arachis hypogaea 40 Glycine max 40 Phaseolus aureus 22 Gossypium hirsutum Mangifera indica

Manihot utilissima Saccharum 52 40 36 80 6 Chromosome Components Secondary Constriction Satell ite Primary Constriction

7 Chromosome -Types 8 Polytene Chromosomes Discovery C.G. Inter bands, along the Characteristic length of features the chromoso

me. Balbiani Salivary gland chromoso mes, as Other Name they occur in the salivary glands. 9 Special Types: Lampbrush Chromosomes Description by

Discovery Observation by In giant nucleus of Occurrence the At the Lateral loops of DNA extend Structure as a result of intense RNA synthesis. 10

Genetic Engineering 11 GE - Applications Formati Correct Product on of ing ion of pest

inborn protein resista genetic nt, defects s, Pharmace enzyme utical Industry s, Agricultur

disease e resista . e.g., Medicine product hormon nt ion of es, plants, human

antibio edible growth tics vaccine hormon s e Determ ine crimina ls

Forensic throug Science h DNA finger printin g etc. 12 Thank you 13

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