Define and design a test cross.

Define the term crossing over. Name the stage of cell cycle when it occurs.

A round table cover has six equal designs as shown in fig. If the radius of the cover is 28 cm, find the cost of making the designs at the rate of ? 0.35 per cm^2 . (use sqrt 3=1.7)

There are five round stickers, 3 of them are red and the other two are green. It is desired to make a design by pasting them in a row. How many such designs are possible ?

Explain why it is impossible to design a heat energy with 100% efficiency?

Given ere are figures of a few folded wheets and designs drawn about the fold.In each case,draw a rough diagram of the complete figure that would be seen when the design is cut off.