Is Klon der, die or das?

The correct German article for Klon is der. The noun Klon is Masculine. So you always say: der Klon. Learn the article together with the noun — German nouns don't follow predictable gender rules most of the time.

The plural of Klon is: die Klone. In the plural, every German noun takes the article "die". So: die Klone. Example: ein Klon → zwei Klone.

Correct: die Klone. The form "die Klons" is wrong. The plural of der Klon is die Klone. In the nominative plural, you always use the article "die".

der Klon follows the four German cases. Nominative: der Klon, Accusative: den Klon, Dative: dem Klon, Genitive: des Klons. In plural: die Klone / den Klonen. Learn these forms together with the noun.

The genitive singular of der Klon is: des Klons. The genitive plural is der Klone. German uses the genitive to express possession or belonging. Example: die Farbe des Klons.

The dative plural of Klon is: den Klonen. In German, dative plural nouns usually end in "-n". So you say: "mit den Klonen". Use this case after prepositions like mit, von, bei, zu.

Klon is a noun and must be capitalized in German. You'll find example sentences above for each case. The article der stays the same in nominative singular but changes in other cases. Practice declension in your own sentences.

Yes, Klon is a noun (also called a substantive). German nouns are always capitalized. The article for Klon is der. Every German noun has a fixed article you must memorize.