Which one of the following symbols and its representation,used in human pedigree analysis is correct?

In transgenics,the expression of a transgene in the target tissue is determined by:

Which one of the following elements shows the maximum number of different oxidation states in its compounds?

What are the approximate weight and diameter of $Rafflesia$ $arnoldii$?

$A$ double convex lens,made of a material of refractive index $\mu_1$,is placed inside two liquids of refractive indices $\mu_2$ and $\mu_3$,as shown. Given $\mu_2 > \mu_1 > \mu_3$. $A$ wide,parallel beam of light is incident on the lens from the left. The lens will give rise to

Which one of the following statements is correct with respect to basic character?