In phenylketonuria

  • A

    Break down of phenylalanine is rapid

  • B

    Accumulation of phenylalanine in body

  • C

    Chromosomal constitution of patient changes

  • D

    $TSD$ gene situated on chromosome $15$ undergoes mutation

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Mendelism was rediscovered by

$I.$ Morgan

$II.$ De Vries

$III.$ Correns

$IV.$ Tschermark

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The phenomenon of incomplete dominance was observed by

‘Eugenics’ pertains to

  • [AIPMT 1990]

The barr body is observed in