(a) What are chromosomes? (b) Explain in brief how stability of DNA content of a species is ensured in sexually reproducing organisms?
(a) What are chromosomes? (b) Explain in brief how stability of DNA content of a species is ensured in sexually reproducing organisms?
Official answer
(a) Chromosomes are thread-like structures in which the genetic material (DNA) is tightly packed within the nucleus of a cell. (b) The stability of DNA content of a species is ensured in sexually reproducing organisms by the process of meiosis during gamete formation. Meiosis ensures that the DNA content of the species remains constant from generation to generation.
Marking scheme
- 1.3 marks
Analysis and explanation
This question requires the student to recall the definition of chromosomes and explain how the stability of DNA content is ensured in sexually reproducing organisms. The student should be able to provide a clear and concise answer based on their understanding of the topic.
Question details
Q30 of 39 questions
- Board
- CBSE
- Class
- Class 10
- Subject
- Science
- Year
- 2025
- Section
- Section C
- Marks
- 3
- Type
- Short Answer
- Chapter
- Heredity
- Topic
- Heredity
- Bloom's level
- Remembering
- Syllabus topic
- Heredity
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Frequently asked questions
How many marks does this question carry in CBSE Class 10 Science 2025?
This question carries 3 marks in the CBSE Class 10 Science 2025 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 "Heredity" from CBSE Class 10 Science.
What type of question is this in the CBSE Class 10 Science 2025 paper?
This is a Short Answer question from Section C in the CBSE Class 10 Science 2025 paper.