Inside the nucleoplasm a tangled mass of thread-like structures is called chromatin. They are formed of an acid called Deoxyribonucleic Acid (DNA) and proteins. When a cell starts to divide, the tangled mass of chromatin condense into long threads and finally, rod-like bodies called chromosomes. The chromosomes contain stretches of DNA which carry information for protein synthesis. A gene is called the hereditary unit and DNA is called the hereditary material. A chromatid is one copy of duplicated chromosome which is generally joined to the other copy by a centromere.
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The gene is the basic physical unit of inheritance. Genes are passed from parents to offspring and contain the information needed to specify traits. Genes are arranged, one after another, on structures called chromosomes. A chromosome contains a single, long DNA molecule, only a portion of which corresponds to a single gene. Humans have approximately 20,000 genes arranged on their chromosomes.
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- The thread like structure present in the nucleus are called the chromosomes or the chromatin, when the degree of condensation is very less.
- Nucleolus is the region on the chromosomes that codes for the ribosomal RNA.
- Genes are the segments of DNA that code for the proteins.
- These are located on the chromosomes.
- The chromosomes are the thread like structures made up of DNA and proteins and are present in the DNA.
- Ribosomes are the ribo-nucleoproteins present in the cytoplasm that take part in protein formation.
Ribosomes are the ribo-nucleoproteins present in the cytoplasm that take part in protein formation.Hence, the correct answer is 'Chromosomes'
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