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.

In a monohybrid cross, the phenotypic ratio of F_2 generation is ……… . 1 tall: 3 dwarf 2 tall: 2dwarf 3 tall: 1 dwarf 3 tall: 2 dwarf

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

State whether the following statements are True or False: In a monohybrid ratio, the phenotypic ratio is 9:3:3:1 .

In a monohybrid cross of plants with red and white flowered plants, Mendel got only red flowered plants.On self pollinating these FI plants got both red and white flowered plants in 3:1 ratio.Explain the basis of using RR and rrsymbols to represent the genotype of plants of parental generation.

Three distinct points A, B and C are given in the 2-dimensional coordinate plane such that the ratio of the distance of any one of them from the point (1, 0) to the distance from the point (-1, 0) is equal to 1:3. Then the circumcentre of the triangle ABC is at the point

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

Questions based on paragraph A geneticist made a cross between two pea plants having axillary flowers (AA) and round shaped seeds (RR) with plants having terminal flowers (aa) and wrinkled seeds (rr). In F_1 generation, he obtained plants with axillary flowers and round shaped seeds. But in F generation, he obtained new combinations along with parental combinations. Write the phenotypic ratio of F_2 generation?

Three ships A ,B ,and C sail from England to India. If the ratio of their arriving safely are 2:5, 3:7, and 6:11, respectively, then the probability of all the ships for arriving safely is

Questions based on paragraph A geneticist made a cross between two pea plants having axillary flowers (AA) and round shaped seeds (RR) with plants having terminal flowers (aa) and wrinkled seeds (rr). In F_1 generation, he obtained plants with axillary flowers and round shaped seeds. But in F generation, he obtained new combinations along with parental combinations. Write the genotypic ratio of F_2 generation?

Two resistances X Omega and Y Omega are connected in the left and right gap of a metre bridge. A null point was found on the bridge wire such that the ratio of lengths of two segments of wire is 2:3 . The distance of the null point was measured from the left end of the wire. When the valueof X is increased by 20 Omega , the position of the null point divides the wire into segments of lengths in the ratio 4:1 .Determine X and Y.