Holandric genes are

  • A
    Carried by $X$ chromosomes
  • B
    Carried by the non-homologous region of $Y$ chromosomes
  • C
    Carried by $X$ and $Y$ chromosomes
  • D
    Carried by autosomes

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Match the following columns:
Column-$I$ (Mechanism of Sex Determination) Column-$II$ (Example)
$P$. $XO$ type $I$. Grasshopper
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Who traced a specific nuclear structure all through spermatogenesis in a few insects and named it $x-$body?

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