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Quick Revision : Molecular Basis of Inheritance Video Lecture | Biology Class 12 - NEET

FAQs on Quick Revision : Molecular Basis of Inheritance Video Lecture - Biology Class 12 - NEET

1. What is the structure of DNA and how does it relate to inheritance?

Ans. DNA, or deoxyribonucleic acid, has a double helix structure composed of two strands that wind around each other. Each strand is made up of nucleotides, which include a sugar, a phosphate group, and a nitrogenous base (adenine, thymine, cytosine, or guanine). The sequence of these bases encodes genetic information. During reproduction, DNA is replicated and passed on to offspring, ensuring the inheritance of traits.

2. What role do genes play in inheritance?

Ans. Genes are segments of DNA that contain instructions for the synthesis of proteins, which determine an organism's traits. Each individual carries two alleles for each gene (one inherited from each parent). The combination of these alleles influences the expression of traits, leading to variations among individuals. This genetic variation is fundamental to the process of inheritance.

3. How did the experiments of Gregor Mendel contribute to our understanding of inheritance?

Ans. Gregor Mendel, through his experiments with pea plants in the mid-19th century, established the foundational principles of genetics. He discovered that traits are inherited in discrete units, now known as genes, and formulated the laws of segregation and independent assortment. Mendel's work laid the groundwork for modern genetics and our understanding of inheritance patterns.

4. What is the significance of the genetic code in molecular inheritance?

Ans. The genetic code is a set of rules by which the information encoded in DNA is translated into proteins. It consists of sequences of three nucleotides (codons) that correspond to specific amino acids. This code is universal among almost all organisms, making it crucial for the process of protein synthesis and ultimately for the inheritance of traits.

5. How do mutations affect genetic inheritance?

Ans. Mutations are changes in the DNA sequence that can occur naturally or due to environmental factors. They can affect an organism's traits by altering the function of proteins. Some mutations are benign, while others can lead to genetic disorders or increase the adaptability of a species. Mutations are a source of genetic variation, which is essential for evolution and natural selection.

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Oct 15, 2025 Last updated

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Video Description: Quick Revision : Molecular Basis of Inheritance for NEET 2025 is part of Biology Class 12 preparation. The notes and questions for Quick Revision : Molecular Basis of Inheritance have been prepared according to the NEET exam syllabus. Information about Quick Revision : Molecular Basis of Inheritance covers all important topics for NEET 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Quick Revision : Molecular Basis of Inheritance.

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	Biology Class 12 59 videos\|290 docs\|168 tests

Biology Class 12

59 videos|290 docs|168 tests

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