x4y3Answer B It can be written as x4y3 but it can be switched around such as: 4x3y. This means 4 lots of x's and 3 lots of y's or 4x times 3y.Ermm I could be wrong.
These are traits that are linked to the sex chromosomes.Only males can get Y-linked traits because only males have a Y chromosome.(Note: it's a bit more complicated that even this explanatin, but...