Question

How are chromatin, chromatid and chromosomes related to each other?
A. Chromosomes are made up of chromatin
B. Chromatin is made up of chromosomes
C. Chromatin is made up of chromatids
D. Chromosomes are made up of chromatids and chromatids are made up of chromatin.

Answer 1

Hint: As we already know, chromosomes are the thread-like structures of the nucleic acids and proteins that are found in the nucleus of living cells. This carries genetic information in the form of the genes. Here, we are going to find the relation between the chromosomes, chromatid and chromatin through some information. Through this, it could be found and analyzed.

Complete answer:
Chromosomes are the long DNA molecule that has all genetic material of an organism. These carry the genetic information in the form of genes. Generally, humans have twenty three pairs of chromosomes. This makes the DNA tightly packed with histone. Cell division is the most important thing that is involved in the growth and development of an organism. Chromatin is the stable substance of the nuclei. These consist of DNA, RNA and various proteins that form chromosomes in the cell division. It is a genetic material which is also known as macromolecules. This is located within the cell nucleus. Then coming to chromatids, they are one-half of the duplicated chromosomes. Each contains a double helix of the DNA. This contains both parallel as well as paired strands of the duplicated chromosome that are joined by the single centromere. Chromatin fibers are generally made up of the polynucleotide strands of the DNA which fits into the cells. Chromatids are made up of chromatin. Chromosomes contain two sister chromatids.

So, it is clear that the correct answer is Option D.

Note: Chromosomes contain two threads and these are chromatids. Here, the long thread-like structures is known as chromatin whereas the short thread-like structures is known as chromatid. During the process of cell division, the chromatin becomes short and thickened. These are known as the chromosomes. Hence, it is clear that chromosomes are made up of chromatids. The chromatids are made up of chromatins.