EXERCISE

In the following human pedigree chart, the mutant trait under consideration is shaded black. The squares indicate males and the circles females.

From the above one can say that the gene responsible for the trait is

A dwarf pea plant was treated with gibberellic acid. It grew as tall as the pure tall pea plant. If this treated plant is crossed with a pure tall plant, then the phenotypic ratio of ${\mathrm{F}}_2$ is likely to be

Imagine that in the pea plants the factors for controlling seed coat colour and shape of seeds are present on the same chromosome very close together. Performing dihybrid experiments with these characters, Mendel would not have been able to arrive at the idea to

When two genes are situated very close to each other in a chromosome

The base sequence for a nucleic acid segment is given as $\mathrm{GAG}, \mathrm{AGG}, \mathrm{GGA}, \mathrm{CCA}$. From this it can definitely be concluded that it is a segment of a

A DNA strand is directly involved in the synthesis of all the following except:

A colour-blind man marries the daughter of a colour-blind person. In their progeny:

Usually, the recessive character is expressed only when present in a double recessive condition. However, a single recessive gene can express itself in human beings when the gene is present on: