Dr.R.Rajprasath,Junior resident,JIPMER

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DNA & structure

Gene & Genome

Chromosomes

Chromatin & Chromatids

Locus & Allele

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nucleic acid-stores & transmits genetic information

Repeating sequences of nucleotides

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Unit of genetic information encoded by DNA

Organised into a number of rod shaped organelle called CHROMOSOMES.

GENOME : complete sets DNA of an organism

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Condensed DNA + histone+ non histone proteins

Chromatin: uncondensed DNA+ histone+ non histone proteins

Euchromatin : active

Heterochromatin : inactive

Chromatid : cell division- replica of chromosome

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locus-precise position of gene in a chromosome

Allele- pair of genes in same locus in homologous chromosomes

homozygous heterozygous

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Gene,loci,chromosome DNA,allele…??!!

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Have a brake..

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