What is the accurate cytogenetic notation for Down syndrome caused by a translocation between chromosome 14 and chromosome 21?

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47, X &, +247, XY, missing chromosome 14 with translocation between 14 and 2146, XY, deletion of chromosome 14 with translocation between 14 and 2147, XY, with translocation t(14;21)

Explanation

Option D correctly represents the karyotype for Down syndrome due to a translocation between chromosomes 14 and 21, showing an extra chromosome resulting from this rearrangement. The other options either indicate incorrect chromosome numbers or missing chromosomes, which do not correspond to the translocation form of Down syndrome.