Which of the following is a placental mammal and not a marsupial?

Select the incorrect statement:

The offspring from a cross between two individuals differing in at least one set of characters is called

Blood group of a person is $A$ and he is suffering from albinism. What percentage of his gametes will have genotype $I^A a$?

Select the correct option for the following statements:
$P - F_1$ generation shows traits of both parents.
$Q - F_1$ generation shows a new trait (intermediate).
$R - F_1$ generation shows only one of the two parental traits.
$\quad \quad P \quad Q \quad R$

The number of chromosomes in the cells of bread wheat ($Triticum$ $aestivum$) indicates that it is ...... .