Define (a) chromosome (b) chromatin fibre (c) chromatids
Answers
CHROMTIN - These are thin thread like structure present in nucleolus which carry geans ( which are responsible for the inheritance of charecters from parents to offsprings )
CHROMATIDS - Two filaments joined at centromere which constricts Chromosomes .
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Answer:
Chromosomes: 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 unique.
Chromatin fibers: Chromatin fibers are coiled and condensed to form chromosomes. Chromatin makes it possible for a number of cell processes to occur including DNA replication, transcription, DNA repair, genetic recombination, and cell division.
Chromatid: A chromatid is one half of a duplicated chromosome. Before replication, one chromosome is composed of one DNA molecule. Following replication, each chromosome is composed of two DNA molecules; in other words, DNA replication itself increases the amount of DNA but does not increase the number of chromosomes.