Which one of the following cannot be explained on the basis of Mendel’s law of dominance?

  • [AIPMT 2010]
  • A

    The discrete unit controlling a particular character is called a factor.

  • B

    Out of one pair of factors one is dominant, and the other recessive.

  • C

    Alleles do not show any blending and both the characters recover as such in $F_2$ generation.

  • D

    Factors occur in pairs .

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  • [AIIMS 2005]

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Definitions / Explanation : Test cross
 

In order to obtain the. $F_1$ generation Mendel pollinated a pure-breeding tall plant with a pure breeding dwarf plant. But for getting the $F_2$ generation, he simply self pollinated the tall $F_1$ plants. Why ?

If in a garden pea plant, a cross is made between red flowered and white flowered plants. What will be the phenotypic ratio in $F_2$ generation

  • [AIPMT 2002]