b) What are they composed?
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Chromosomes are thread-like structures located inside the nucleus of animal and plant cells. Each chromosome is made of protein and a single molecule of deoxyribonucleic acid (DNA). Passed from parents to offspring, DNA contains the specific instructions that make each type of living creature uniqueExplanation:
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Chromosomes are composed of single DNA(Deoxyribo Nucleic Acid) molecule and proteins. Chromatin material is thread like strucure that condenses to form x shaped chromosomes during cell division. Chromosomes are positioned inside the nucleus of plants and animals cells.
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