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Principles of Inheritance and Variation — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYPrinciples of Inheritance and Variation1 Mark
MCQ
 Across between two tall plants resulted in offspring having few dwarf plants. What would be the genotypes of both the parents?
  • A
    $TT$ and $Tt.$
  • ✓
    $Tt$ and $Tt.$
  • C
    $TT$ and $TT.$
  • D
    $Tt$ and $tt$
✓

Answer

Correct option: B.
$Tt$ and $Tt.$
In case of $TT$ and $Tt$; all offspring would be tall $(TT, Tt)$. In case of option $'c\ ’$ no gene for dwarf is present, so all offspring will be tall. In case of option $'d\ ’$ one of the parent plant is dwarf, so it is incorrect. In case of option $'b\ ’$ most of the offspring will be tall and a few will be dwarf $(TT, Tt, tt)$. Option $'b\ ’$ is the correct answer.

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