Which of the following scientists observed for the first time X chromosome in some male insects and named it as X-body?

✅ Explanation:
Henning Henking, a German biologist, was the first to observe X chromosomes in some male insects in 1891. He named these chromosomes "X-bodies".

Other options explanations:
-Bridges: Calvin Bridges was an American geneticist who, along with Thomas Hunt Morgan, discovered the role of X chromosomes in sex determination in Drosophila.
-Sturtevant: Edmund Beecher Sturtevant was an American geneticist who, along with Morgan and Bridges, developed the chromosome theory of heredity.
-Wilson and Stevens: Edmund Beecher Wilson and Nettie Stevens were American biologists who, independently of each other, discovered that X chromosomes are involved in sex determination in insects.

🔴 Related terminologies:
-X chromosome: A chromosome that is present in both males and females, but is present in two copies in females and one copy in males.
-Autosome: A chromosome that is not an X chromosome or a Y chromosome.