AGB-0075
QUESTION
The genomic formula for trisomy is given by?
OPTIONS
(A) 3n
(B) 3n+1
(C) 2n+3
(D) 2n+1
ANSWER
(D) 2n+1
EXPLANATION
The genomic formula for trisomy is 2n+1, meaning that one chromosome is present in three copies while the remaining chromosomes retain the normal diploid condition. 2n−1 represents monosomy, 3n represents triploidy, and 3n+1 describes a triploid complement with one additional chromosome rather than ordinary trisomy.
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