Question Video: Placing Genes- Chromosomes and a Nucleus into Size Order | Nagwa Question Video: Placing Genes- Chromosomes and a Nucleus into Size Order | Nagwa

Question Video: Placing Genes- Chromosomes and a Nucleus into Size Order Science • Third Year of Preparatory School

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Below are some structures you will find in a human cell: (1) A single gene (2) A nucleus (3) A chromosome. Order them from smallest to largest size.

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Video Transcript

Below are some structures you will find in a human cell: one, a single gene; two, a nucleus; three, a chromosome. Order them from smallest to largest size. (A) A chromosome is smaller than a single gene is smaller than a nucleus. (B) A nucleus is smaller than a chromosome is smaller than a single gene. (C) A single gene is smaller than a chromosome is smaller than a nucleus. Or (D) a chromosome is smaller than a nucleus is smaller than a single gene.

To answer this question, let’s look at the organization of genetic material inside a cell. Our genetic information is located in a molecule called DNA. DNA is a very long molecule, and it contains different segments that code for specific characteristics like our hair color or eye color. These segments are called genes. Our DNA is organized into different chromosomes. In humans, we have 46 chromosomes in most cells of our body. Each chromosome is a tightly packed molecule of DNA with many genes. These chromosomes are stored in the nucleus of our cells.

So if you put it all together, the order from smallest to largest is option (C), a single gene is smaller than a chromosome is smaller than a nucleus.

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