A person has to perform crosses for the purpose of studying inheritance of a few traits/characters.What would be the criteria for selecting the organisms?

What are true breeding line's that are used to study inheritance pattern traits in plants

A nearsighted person has a far-point located 7.5 m from the eye : What would be the power, if a contact lens were used ?

A university has to select an examiner from a list of 50 persons, 20 of them are women and 30 men, 10 of them knowing Hindi and 40 not, 15 of them being teacher and the remaining 35 not. What is the probability of the two university selecting a Hindi knowing women teacher?

If a true breeding homozygous pea plant with green pod and axial flower as dominant characters is crossed with a recessive homozygous pea plant with yellow seeds and terminal flowers, then what would be the: genotypes of the two parents phenotypes and genotype of the F_1 offspring phenotypic distribution ratio in F_2 population?