What are characters or traits (2 or more) controlled by a single gene called? Explain with an example. Why its phenotypic ratio is `2:1 instead of 3:1`?

Why is the final ratio in pleiotropy 2 : 1? Give reason.

If the angles of a triangle are in the ratio 1:2:3,the corresponding sides are in the ratio

Answer the following question What are F_1 and F_2 generations? Why are genotypic and phenotypic ratios different in these generations?

The genotypic ratio 1 : 2 : 2 : 4 : 1 : 2 : 1 : 2 : 1 is obtained in F_2 generation. What will be the phenotypic ratio?

Time period of a pendulum on earth surface is T_1 . It is arranged on earth surface at a height R and thus its time period is T_2 . What is the ratio of T_1 and T_2 ?

The acute angle between the lines having direction ratios 5,4,1 and -3,2,1 is

A and B are two concentric circular conductors of centre O and carrying currents i_(1) and i_(2) as shown in the adjacent figure. If ratio of their radii is 1:2 and ratio of the flux densities at O due to A and B is 1:3 , then the value of i_(1)//i_(2) is

Choose the correct alternative answer for each of the following question The denominator of a fraction is 2 more than the numerator. If 1 is subtrated from the numerator and 1 is added to the denominator, the fraction becomes 1/2 . What is the fraction?

During studies on the sex linked genes in Drosophila, Morgan found that the phenotypic ratio of the F_2 generation deviated from the expectd 9 : 3 : 3 : 1 ratio. Explain the conclusion he arrived at.

The densities of two planets are in the ratio of 2 : 3 and their radii are in the ratio of 1 : 2. What is the ratio of acceleration due to gravity at their surfaces ?