Punnet square is used to know

The instrument that is used to know direction and speed of wind is:

What instrument is used to know the relative density of liquids ?

A colour blind carrier womanmarries a normal man.With the help of Punnet square show the types of progeny formed.

A haemophilic carrier female marries a normal man, with the help of punnet square, show the type of progeny formed.

Which instrument is used to know the presence of an electric current ?

Which technique is used to know the age of fossils?

Which technique is used to know the age of fossils ?

Which technique is used to know the age of fossils?

Which property of magnet is used to know the directions?

Which property of magnet is used to know the directions?