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Answers: Chromatin is the complex of DNA and proteins that forms chromosomes within the nucleus. During cell division, chromatin condenses to form distinct chromosomes, ensuring efficient DNA distribution. Each chromosome consists of two identical chromatids, joined at the centromere, before they separate into daughter cells. Thus, chromatin forms chromosomes, and each chromosome is made up of two sister chromatids before division.
Complete Answer:
Chromosomes are long, thread-like parts made of DNA that carry all the genetic information of a living being. This information is stored in genes. Humans usually have 23 pairs of chromosomes. DNA is tightly packed with special proteins called histones.
Cell division is an important process that helps living things grow and develop. Inside the cell’s nucleus, there is a substance called chromatin. It is made of DNA, RNA, and proteins, and it forms chromosomes during cell division. Chromatin is also called genetic material and is found inside the nucleus of a cell.
When chromosomes copy themselves during cell division, each half is called a chromatid. A chromatid has a double strand of DNA, and two chromatids are joined in the middle by something called a centromere. Chromatin is made of DNA strands, and chromatids are made of chromatin. A complete chromosome has two sister chromatids.
Thus, it is clear that Option D is the right answer.
Conclusion: The two threads that make up chromosomes are called chromatids. In this context, the long thread-like structures are referred to as chromatin, while the short ones are called chromatids. Additionally, the chromatin thickens and gets shorter during cell division. We refer to these as the chromosomes. It follows that chromatids are the building blocks of chromosomes. Chromatins make up the chromatids.
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