2020 source guide · Biology

NEET 2020 Biology Genetics Questions

Use this page to connect the official 2020 paper with current Biology practice. NeetVellum does not claim a chapter appeared in that paper until the official question and final key have been mapped.

Practice 275 verified questions →Check official NTA archive ↗

What to master

inheritance patterns, linkage, molecular genetics, gene expression and variation.

Original practice preview

These are current-syllabus NeetVellum questions, shown separately from historical-paper provenance.

Example 1 · difficulty 1/5

Mendel selected true-breeding pea plants with tall stems and dwarf stems. After crossing them, all F₁ plants were tall. Which conclusion is directly supported by this observation?

A. Tallness is dominant over dwarfness
B. Dwarfness is dominant over tallness
C. The factors for height blend permanently in F₁
D. Every tall plant must be homozygous

Example 2 · difficulty 1/5

Which feature of garden pea most directly helped Mendel obtain genetically pure parental lines before performing crosses?

A. Its seeds lack visible contrasting characters
B. Its flowers are naturally self-pollinating
C. Each plant produces only one seed
D. Its chromosomes can be seen without a microscope

Example 3 · difficulty 1/5

A heterozygous tall pea plant is self-pollinated. What genotypic ratio is expected among its offspring?

A. 3 TT : 1 tt
B. 1 TT : 1 Tt
C. 1 TT : 2 Tt : 1 tt
D. 3 Tt : 1 tt

The evidence-first practice loop

1. Verify provenanceOfficial paper and final key before accepting a PYQ label.
2. Attempt closed-bookExpose the concept or execution gap before rereading.
3. Repair and returnClassify the miss and re-practice after a delay.

Canonical chapter practice

Principles of Inheritance and Variation →Molecular Basis of Inheritance →

Frequently asked questions

Are these official NEET 2020 Biology Genetics PYQs?

No. The previews are original NeetVellum practice questions. A historical item receives a PYQ label only after its official paper and authoritative final answer key are attached. Use the official archive for the source paper.

How should I use the NEET 2020 paper?

Solve the official paper under its original timing, verify against the final key, classify every miss, and then use the linked current-syllabus practice bank to repair the exposed concept.