MCQ
Which one of the following represents a pal- indromic sequence in DNA?
- A5'-CCAATG-3' 3'-GAATCC-5'
- B5'-CATTAG-3' 3'-GATAAC-5'
- C5'-GATACC-3' 3'-CCTAAG-5'
- D5'-GAATTC-3' 3'-CTTAAG-5'
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$(1)$ Haemophilia is a sexlinked recessive disease.
$(2)$ Down’s syndrome is due to aneuploidy.
$(3)$ Phenylketonuria is an autosomal recessive gene disorder.
$(4)$ Sickle cell anaemia is an $X$-linked recessive gene disorder.