What is the fundamental unit of heredity composed of DNA? By Kalsoom Tahir ✅ Fact Checked 📊 Difficulty Easy 📅 Last Updated 13 Aug 2026 A. Gene B. Allele C. Nucleus D. Mitochondrion Check Answer 💡 Explanation: A gene is a distinct sequence of nucleotides forming part of a chromosome, serving as the basic unit of heredity. 📚 Topics: Biology Science 🎯 Exams: CSS GEN NTS PMS
