A pedigree chart below shows the inheritance of a particular sex-linked trait ("trait") Key: Unaffected Males Affected Males Unaffected Females Affected Females How is the trait being studied in the pedigree chart above?

The traits controlled by the genes located on $X$ chromosome of human beings are said to be

The progenies are found to be male sterile after crossing two plants. This is due to some genes, which are present in

The chromosomes responsible for the determination of sex are called

One of the parents of a cross has mutation in its mitochondria. In that cross, that parent is taken as a male. During segregation of $F_{2}$-progenies that mutation is found in