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Science · 2026 · 3 marks
CBSE 2026 · Region 3 · Set 1 · Q14
Show the cross and observations made by Mendel when he crossed pure tall pea plant with a pure short pea plant to get $\displaystyle \mathrm{F}_{1}$ progeny.
Marking-scheme solution
Parents: TT x tt (Tall) (short)
Gametes:
Tt
All Tall plants
Observations:
Tt
All Tall plants
Observations:No medium or short height plants were observed in F1 generation.
All progeny resembles one of the parents.
All plants were tall.
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CBSE Class 10 Science past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.