Cri­-du-­chat syndrome in humans is caused by the

  • [AIPMT 2006]
  • A

    trisomy of $21^{st}$ chromosome

  • B

    fertilization of an $XX$ egg by a normal $Y$-­bearing sperm

  • C

    loss of half of the short arm of chromosome $5$

  • D

    loss of half of the long arm of chromosome $5$

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What is the role of $RNA$ polymerase $III$ in the process of transcription in Eukaryotes?

  • [NEET 2023]

Sir Archibald is associated with

Select the correct option regarding genetic code of Glycine

  • [AIIMS 2019]

The possibility of three letter genetic code was pointed out by

Match the columns.

Column - $I$ Column - $II$
$(a)$ $U U U$ $(1)$ Serine
$(b)$ $G G G$ $(2)$ Methionine
$(c)$ $(c)$ $U C U$ $(3)$ Phenylalanine
$(d)$ $C C C$ $(4)$ Glycine
$(e)$ $A U G$ $(5)$ Proline