Which of the following statements is incorrect?

In peas,a pure tall plant $(TT)$ is crossed with a short plant $(tt)$. The ratio of pure tall plants to short plants in $F_2$ is

In pea plants, which trait is dominant between height and dwarfness?

In a monohybrid cross between tall pea plants denoted by $TT$ and short pea plants denoted by $tt,$ SehajAnant obtained only tall plants denoted by $Tt$ in the $F_{1}$ generation. However,in $F_{2}$ generation she obtained both tall and short plants. Using the above information,explain the law of dominance.

The continuity of features from one generation to another is known as

Select the statements that describe characteristics of genes:
$(i)$ genes are specific sequence of bases in a $DNA$ molecule
$(ii)$ a gene does not code for proteins
$(iii)$ in individuals of a given species,a specific gene is located on a particular chromosome
$(iv)$ each chromosome has only one gene