In mendel'sexperiment,f1 progeny had no halfway of intermediate features .explain with eg.?

In F1 progeny of Mendel experiment there were no halfway characteristics. This meant that only one trait was seen as shows in following cross.
 
  t t
T Tt Tt
T Tt Tt

This cross shows that when we cross between tall plant and dwarf plant, F1 progeny have only tall plants because trait of tall plant is dominant over dwarf trait and in heterozygous plant the tall trait has been expressed.

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If we take a tall plant with geneTT and a dwarf plant with gene tt and crisscross the alleles according to law of separation, we get all tall plants with genes Tt. As 'T'is dominant over 't' we can say that all are tall plants
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