cDNA is short for coding DNA. It is the DNA sequence matching the splicedmRNA, that is, the exons of an eukaryoticgene. In prokaryotes, the cDNA matches the primary mRNA transcript, as there are no exons or introns.
... (in/at/by them) at the end of the second line is in locative
plural. Translated: "...in them".
History
Sanskrit is the oldest member of Indo-Aryan[?] ...