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
Connect the official 2021 paper with current Biology practice without labelling original previews as PYQs.
500 original questions · explicit provenance labels
BiologyPlate 50
NeetVellum atlas · fig. biology
50
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.