Q10
1 markMCQSection A

The statement that correctly describes the characteristic(s) of a gene is:

Heredity
Rules for the Inheritance of Traits – Mendel's Contributions

Options

(a)In individuals of a given species, a specific gene is located on a particular chromosome.
(b)A gene is not the information source for making proteins in the cell.
(c)Each chromosome has only one gene located all along its length.
(d)All the inherited traits in human beings are not controlled by genes.
Official Answer

The correct statement is (a). In individuals of a given species, a specific gene is located on a particular chromosome.

genechromosomeDNAprotein

Marking Scheme

  • 1Identifying that genes are located on specific chromosomes (1 mark)

Hint

Recall that chromosomes are made of DNA and contain many genes. A gene is a section of DNA that codes for a protein.

Quick Oral Answer

A gene is a section of cellular DNA that provides information for making a specific protein, which in turn controls a specific trait.

Analysis & Explanation

Option (a) is correct because chromosomes are independent pieces of DNA, and specific genes are located at specific positions on specific chromosomes in all individuals of a species.

Option (b) is incorrect because the NCERT text states: "A section of DNA that provides information for one protein is called the gene for that protein." Thus, genes are the information source for making proteins.

Option (c) is incorrect because each chromosome contains many genes along its length, not just one.

Option (d) is incorrect because genes control characteristics or traits in human beings.

Common Mistakes

  1. 1Thinking that a chromosome contains only one gene.
  2. 2Believing that genes do not code for proteins.

Interesting Facts

Humans have about 20,000 to 25,000 genes distributed across 23 pairs of chromosomes.

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Frequently Asked Questions

How many marks does this question carry in CBSE Class 10 Science 2023?

This question carries 1 mark in the CBSE Class 10 Science 2023 examination.

Which chapter does this question come from in Science?

This question is from the chapter "Heredity" in the CBSE Class 10 Science syllabus.

What topic does this question cover in Science?

This question covers the topic "Rules for the Inheritance of Traits – Mendel's Contributions" from CBSE Class 10 Science.

What type of question is this in the CBSE Class 10 Science 2023 paper?

This is a MCQ question from Section A in the CBSE Class 10 Science 2023 paper.