What is Gene _ It’s Meaning and Definition A gene is the basic physical and functional unit.
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Here’s a clear and concise explanation of “Gene” — its meaning and definition, useful for school, competitive exams (like NEET/NCERT/UGC NET), or general biology understanding:
🧬 What is a Gene?
Gene (जीन) एक मौलिक भौतिक और कार्यात्मक इकाई है, जो जीवों के लक्षणों को नियंत्रित करती है।
✅ Definition (English):
A gene is the basic physical and functional unit of heredity. Genes are made up of DNA (Deoxyribonucleic Acid) and carry the instructions to make proteins.
🧪 Detailed Explanation:
| Feature | Description |
|---|---|
| 🧬 Structure | A segment of DNA located on a chromosome |
| 📦 Function | Carries genetic information from parents to offspring |
| 🏗️ Role | Guides cells to make specific proteins, which affect traits |
| 🧫 Location | Found inside the nucleus of every living cell |
🔁 Gene → DNA → Protein → Trait
Gene is a code → for making protein → that results in a trait
(Example: Eye color, blood type, height)
📘 Examples of Genes:
- Hb gene → codes for hemoglobin protein
- Ins gene → codes for insulin hormone
- BRCA1/BRCA2 genes → related to breast cancer risk
📚 Gene Definition in Hindi (परिभाषा):
जीन वह डीएनए का खंड (segment) है, जो किसी विशेष प्रोटीन को बनाने की सूचना (code) देता है और यह किसी जीव के लक्षणों (traits) को निर्धारित करता है।
🧠 Quick Facts:
| 🔹 Feature | 🔸 Value |
|---|---|
| No. of genes in humans | ~20,000–25,000 |
| Discovered by | Gregor Mendel (father of genetics) |
| Studied in | Genetics & Molecular Biology |
🧬 Visual Summary (Concept Map):
Chromosome
↓
DNA (double helix)
↓
Gene (segment of DNA)
↓
mRNA (via transcription)
↓
Protein (via translation)
↓
Trait (e.g., eye color, height)
🔍 Want more help?
I can provide:
- Diagram of DNA and genes
- Differences between gene and allele
- NCERT-based Q&A for Class 10/12/NEET
- Summary Notes (PDF) for revision
Would you like any of these?