Genetic & Evolution - NEET Previous Year Questions with Solutions and Weightage

Genetics & Evolution is one of the most important topics in the NEET exam. Its collective weightage is about 18% and 8-10 questions are expected from these topics in the NEET exam 2025.

As per NTA syllabus available on the official website: https://www.nta.ac.in/Download/Notice/Notice_20241230193629.pdf , this concept includes :

• Heredity and variation: Mendelian Inheritance; Deviations from MendelismIncomplete dominance, Co-dominance, Multiple alleles and Inheritance of blood groups, Pleiotropy; Elementary idea of polygenic inheritance; Mendelian disorders in humans-Thalassemia; Chromosomal disorders in humans; Down’s syndrome, Turner’s and Klinefelter’s syndromes.
• Molecular basis of Inheritance: DNA as genetic material; Structure of DNA and RNA; DNA packaging; DNA replication; Central dogma; Transcription, genetic code, translation; Gene expression and regulation- Lac Operon;
• Evolution: Origin of life; Biological evolution comparative anatomy, embryology and molecular evidence); Darwin’s contribution, Modern Synthetic theory of Evolution; Mechanism of evolutionVariation (Mutation and Recombination) and Natural Selection with examples, types of natural selection; Gene flow and genetic drift; Hardy-Weinberg’s principle; Adaptive Radiation; Human evolution.

Genetic and evolution questions with detailed solutions asked in NEET UG 2025 exam are listed below:

Question 1:

Given below are some stages of human evolution. Arrange them in correct sequence. (Past to Recent)

A. Homo habilis

B. Homo sapiens

C. Homo neanderthalensis

D. Homo erectus

Choose the correct sequence of human evolution from the options given below:

• D-A-C-B
• B-A-D-C
• C-B-D-A
• A-D-C-B

View Solution

Question 2:

The flippers of the Penguins and Dolphins are the example of the

• Adaptive radiation
• Natural selection
• Convergent evolution
• Divergent evolution

View Solution

Question 3:

The mother has A+ blood group the father has B+ and the child is A+. What can be the possibility of genotypes of all three, respectively?

• C and D
• D and A
• A and B
• B and E

View Solution

Question 4:

Match List I with List II :

Choose the correct answer from the options given below :

• A-III, B-II, C-I, D-IV
• A-IV, B-II, C-III, D-I
• A-I, B-II, C-III, D-IV
• A-II, B-III, C-IV, D-I

View Solution

Question 5:

Match List-I with List-II:

Choose the correct answer from the options given below:

• A-II, B-I, C-IV, D-III
• A-IV, B-I, C-II, D-III
• A-I, B-II, C-III, D-IV
• A-II, B-III, C-IV, D-I

View Solution

Question 6:

Match List-I with List-II:

Choose the correct answer from the options given below:

• A-IV, B-III, C-II, D-I
• A-III, B-I, C-IV, D-II
• A-II, B-III, C-IV, D-I
• A-III, B-IV, C-I, D-II

View Solution

Question 7:

Aneuploidy is a chromosomal disorder where chromosome number is not the exact copy of its haploid set of chromosomes, due to :

(a) Substitution

(b) Addition

(c) Deletion

(d) Translocation

(e) Inversion

Choose the most appropriate answer from the options given below

• (c) and (d) only
• (d) and (e) only
• (a) and (b) only
• (b) and (c) only

View Solution

Question 8:

Match List I with List II :

Choose the correct answer from the options given below :

• A-IV, B-Ill, C-II, D-I
• A-IV, B-II, C-III, D-I
• A-IV, B-III, C-I, D-II
• A-III, B-IV, C-I, D-II

View Solution

Question 9:

What is the correct order (old to recent) of periods in Paleozoic era?

• Silurian, Devonian, Permian, Carboniferous
• Silurian, Devonian, Carboniferous, Permian
• Permian, Devonian, Silurian, Carboniferous
• Silurian, Carboniferous, Permian, Devonian

View Solution

Question 10:

Given below are two statements:

Statement I: Failure of segregation of chromatids during cell cycle resulting in the gain or loss of whole set of chromosome in an organism is known as aneuploidy.

Statement II: Failure of cytokinesis after anaphase stage of cell division results in the gain or loss of a chromosome is called polyploidy.

In the light of the above statements, choose the correct answer from the options given below:

• Statement I is true but Statement II is false
• Statement I is false but Statement II is true
• Both Statement I and Statement II are true
• Both Statement I and Statement II are false

View Solution

Question 11:

Recombination between homologous chromosomes is completed by the end of

• Diakinesis
• Zygotene
• Diplotene
• Pachytene

View Solution

Question 12:

Match List I with List II :

Choose the correct answer from the options given below :

• A-III, B-IV, C-II, D-I
• A-II, B-I, C-IV, D-III
• A-II, B-III, C-I, D-IV
• A-IV, B-I, C-III, D-II

View Solution

NEET 2025 Biology Exam Pattern

The Biology section in NEET 2025 plays a pivotal role in determining the overall score, given its significant weightage in the exam. Comprising 90 questions out of the total 180, Biology is divided into two subsections: Botany and Zoology. There will be a total of 45 questions in each.

As per the marking scheme, +4 marks will be awarded for correct answers, -1 for incorrect ones, and unattempted questions will not be marked. Time duration for the exam will be 180 minutes.

Each subsection evaluates the aspirant’s knowledge across a wide spectrum of topics from Classes 11 and 12 NCERT syllabi.

NEET Biology Exam Pattern: Section-Wise Marking Scheme

The NEET 2025 Biology section comprises 90 questions, equally divided between Zoology (45 questions) and Botany (45 questions).

The marking scheme awards +4 marks for each correct answer, -1 mark for incorrect answers, and 0 marks for unattempted questions. The Biology section carries a total of 360 marks, split equally between Zoology and Botany. The exam is conducted offline (pen-paper mode).

Class-Wise Biology NEET Syllabus Weightage

Biology NEET Syllabus Weightage

The topic-wise weightage for the syllabus of Biology is provided here based on previous year exam:

Biology NEET Syllabus PDF- Chapter-Wise Weightage

NEET Chapter wise Weightage Biology Class 11

NEET Chapter wise Weightage Biology Class 12

Biology NEET Questions PDF

To practice subject-specific questions for NEET exam preparation, check NEET Biology questions from the link given below.

Biology NEET Exam Pattern 2024

Biology NEET exam pattern 2024 is provided below with the number of questions, type of questions, total marks, and negative marking.

NEET Question Paper 2024 PDF with Answer Key and Solution

NEET 2024 Question Paper PDF Code R

NEET 2024 Question Paper PDF Code Q

NEET 2024 Question Paper PDF Code T

NEET 2024 Question Paper PDF Code S

NEET Re-Exam June 23 Question Paper

NEET Question Paper 2024

NEET Subject Wise Question Paper 2024 PDF with Answer Key and Solution

NEET Sample Paper 2024 PDF Download with Answer

Students must not confuse this sample paper with the actual question paper. This is just a mock paper with answers that will help you with your exam preparation.

Frequently Asked Questions:

Q1. Which topics from Genetics & Evolution have the highest weightage in NEET?

In NEET Biology, certain chapters consistently feature more frequently in exams and carry higher marks. These chapters form a major part of the syllabus and are tested across different sessions. Candidates can expect significant weightage from these sections, and focusing on them can boost your chances of scoring well. Some of these chapters include:

• Human Physiology: This chapter holds significant weight in NEET, contributing around 20% of the total Biology questions. It deals with systems like digestion, respiration, excretion, and circulation.
• Genetics and Evolution: With around 18% of the questions, this chapter focuses on Mendelian genetics, molecular genetics, and evolution, which are frequently tested.
• Plant Physiology: This section contributes about 10% to the Biology syllabus and includes topics like photosynthesis, respiration, and transpiration in plants.

Q2. What types of pedigree analysis questions appear in NEET?

Types of pedigree analysis questions appear is from the following materials:

1. What is pedigree analysis?
2. General assumptions
3. Related biology terms
4. Things to Remember
5. Sample Questions

Q3. What are the important questions and topics covered under the chapter “living world” for the NEET Biology portion?

The living world includes a wide variety of living organisms such as plants, animals, and even microorganisms present on the earth. These organisms also vary in size, colour, habitat, physiology as well as morphology. Biologists have evolved certain rules and principles over time which is helpful in the identification, nomenclature, and classification of organisms. Such rules and principles come under Taxonomy.

Related Links : The Living World: Important Questions

• Some of the essential topics include five kingdom classification, classification of plants and animals and their salient features.
• NEET Study notes for Diversity in Living World, will help you in understanding the concepts and practising sample questions can help you score well in NEET 2022.

Q4. Are there any specific topics I should focus on while practicing NEET Biology questions?

NEET Biology Syllabus is divided into 2 sections - Zoology and Botany. For the 100 questions of Biology, 50 questions are asked from each of the two sections. However, you need to attempt 45 questions each for Zoology and Botany.

Check: NEET 2024 Biology Exam Pattern

You must prepare from NCERT Class 11 and 12 Biology Syllabus to score high marks in NEET Biology section. Preparing the NCERT books of classes 11 and 12 thoroughly is an integral part of your NEET 2024 Biology preparation. Important chapters of NEET Biology Syllabus with high weightage include genetics, diversity in living organisms, biotechnology, human physiology, and reproduction.