Earning a commission as an officer in the Klingon Defense Force, Martok continued to prove himself and advance, ultimately ascending to the rank of general. Abducted by the Dominion, he was replaced by a Changeling, who while posing as Martok, attempted to trigger a war between the Federation and the Empire.
The changeling impersonating Martok once took a blood test, cutting himself with a d'k tahg and allowing blood to drip out of his hand in DS9: "The Way of the Warrior".
It was never stated in canon how the changeling managed this, but Joseph Sisko once suggested that a way a changeling could beat the blood test was to kill a random civilian on the street, absorb the man's blood into itself and release it whenever it took part in a test. It is possible the Martok changeling did this.
Being born in the poor Ketha Lowlands on Qo'noS, Martok became the head of the House of Martok and worked his way up the ranks of the Klingon military, finally serving as Chancellor of the Klingon High Council from 2375 until his apparent death at the hands of J'mpok in 2393.
Understanding what Worf had done, Martok thanked him for reminding him of his duty as a soldier and offered him a place in his house as his brother. By joining the House of Martok, Worf's status in the empire was restored (albeit the House of Mogh remains stricken).
In Star Trek (IDW), Alexander, frustrated with Worf's seeming ignorance of him, joins Kahless II's god-killing cult and pitting him against his father and other Starfleet members. Ultimately, Worf is able to rescue his son, but is left with a bitter frustration.
Bashir says he was held captive by the Changelings for around five weeks. Since he was wearing the old Starfleet uniform, this is meant to signify he was replaced before the Season 5 episode "Rapture," when the new uniforms made their TV debut.
Worthy Opponent: Gowron and Martok speak of the station's crew as this (in Klingon; a bit of research is needed to translate it). Martok: <They fight like Klingons!> Gowron: <Then they can die like Klingons!>
One possibility is that the entire draw tube was a changeling (or part of one) in disguise, so that when Sisko's blood was drawn, the changeling absorbed it, mimicked the material, then reverted some or all of itself to its gelatinous state to give the illusion that Sisko's blood was changeling material.
He was briefly replaced by a Changeling, and spent at least a year in a Dominion internment camp. During this imprisonment, Martok loses an eye in one of his daily sparring matches with the Jem'Hadar.
Memory Alpha notes that there is no canonical maximum estimate for Klingon lifespans, but several Klingons are known to have exceed a century, and some may have made it past 150 (earyh) years. That makes them pretty comparable to 24th century humans.
What happened to the Female Changeling after the war?
By doing so, Odo cured her of the disease, and the Female Changeling agreed to end the war and stand trial for her war crimes. Odo returned to the Great Link to cure the rest of the Founders. The Female Changeling was taken away by Starfleet after signing the Treaty of Bajor.
Gowron's final appearance in Star Trek was in the Deep Space Nine seventh season episode "Tacking into the Wind" where he is killed by Worf after the Klingon Chancellor displays some increasingly dishonorable tactics towards Martok.
Facing Picard in armed combat, Martok was defeated and killed by the human military leader. Picard then took Martok's skull back to Earth, putting it on display in his chateau along with other skulls he had collected over the years, including a Ferengi, an assimilated humanoid, and Gul Dukat.
What does Dax say to Worf when she first meets him?
When Worf and Jadzia first meet he says to her that Curzon Dax was an honored name among his people, and she replies to him in Klingon. When asked what she said by Kira she replies "it loses something in translation". What she said was: "Yeah, but I'm a lot better looking than he was."
He had a Cardassian love interest (Natima Lang), was shown on several occasions to be attracted to both Major Kira Nerys and Lieutenant Commander Jadzia Dax, and once tried to seduce a Vulcan member of the Maquis (although this may have been motivated by his own efforts to find out more about the group).
A changeling that suffers either form of death in the Dreaming dies, their soul passing on to a new incarnation (or, in the case of Arcadian sidhe, disappearing for parts unknown). For someone with an anchor in the Autumn world, death means that the physical body falls into a coma and wastes away.
Reproduction. Ageing slightly faster than humans, changelings are considered mature at around age 15 but have roughly the same lifespan as a human, typically up to 100 years and as much as 110.
Originally Answered: Did Worf have any children on Star Trek: The Next Generation? Yes he had a son named Alexander by a half human half Klingon woman who unfortunately was murdered by another Klingon and worf dueled him and killed him and got his revenge for the murder of his beloved mate.
Later in the series, she becomes involved with the Klingon character Worf, and they marry during the sixth season of the show. In the sixth-season finale Jadzia dies but the Dax symbiote survives, and in the seventh-season premiere returns with a new host Ezri Dax, played by Nicole de Boer.
Worf's correct last name is Rozhenko. It's his adopted name. Klingons don't have last names. They are referred to as [name], Son of [father's name], or House of [family's House name].
