I give you another example: after the SLDF had wiped out the Jaguars other Clans picked Huntress clean. for example the Scorpions took over the production facilities on Abysmal and began producing new variants of certain Mechs.
I mentioned that already.
Or another example: the Foxes began producing new versions of the Timber Wolf but under a new name: Mad Cat MK2 and Mad Cat MK 3
Not a valid example; those are new designs that they created themselves from the ground up, not variants of the Timber Wolf.
The Dragoons "abducted" a sibko which was made out of Alaric's genes and they even planned to send some those to the other Clans (excuding the Jaguars and Falcons) while using the rest as candiates (maybe even as breeding material?)
That can't be according to Clan rules right?
If the sibko wasn't taken in a Trial of Possession, then no. (I have no idea because I haven't/won't read that book, but I assume they weren't.)
Would the other Clans accept that "gift"? Or would they be duty bound to send those children back?
I wouldn't say they'd be "duty bound" to send them back... and why did the book say they were sending some to the other Clans at all?
And could they perhaps trace the genes back? And find out WHO actually are the genefather and gene mother of Alaric?
Katherine's, at least, because she did test into the warrior caste, so it's likely her DNA is on file (with the Wolves). But unlike the pre-WoR days, the Council of Six specifically did not have Blood Chapels/a Master Repository, so I doubt the other Clans have access to those records.