Dominant allele are expressed in

  • A

    Second generation

  • B

    Homozygous condition

  • C

    Heterozygous condition

  • D

    Both $(b)$ and $(c)$

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$A$. Two or more alternative forms of a gene

$I$. Backcross
 $B$. Cross of $F_1$ progeny with homozygous recessive parents $II$. ploidy
$C$. Cross of $F_1$ progeny  with any of the parents $III$. Allele 
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The percentage of heterozygous individuals obtained in $F_2$ generation from selfing the plants with genotype $Rr$ would be

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The crossing of a homozygous tall plant with a dwarf in $F2$ would yield plants in the ratio of