Example 1 · difficulty 2/5
In a monohybrid cross Tt × Tt, what fraction of the tall offspring is expected to be heterozygous?
- A. 1/3
- B. 1/2
- C. 3/4
- D. 2/3
2021 source guide · Biology
NEET 2021 Biology Genetics Questions
Use this page to connect the official 2021 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.
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 2 · difficulty 1/5
Which event during gamete formation provides the cytological meaning of Mendel's law of segregation for a heterozygote Tt?
- A. T and t separate so each gamete receives one allele
- B. T and t enter every gamete together
- C. The t allele is destroyed because it is recessive
- D. The two alleles blend to form an intermediate allele
Example 3 · difficulty 2/5
A tall pea plant of unknown genotype is crossed with a dwarf plant. The progeny contain 52 tall and 48 dwarf plants. What is the most likely genotype of the tall parent?
- A. TT
- B. Tt
- C. tt
- D. Either TT or tt, but not 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
Frequently asked questions
Are these official NEET 2021 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 2021 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.