no prob aquarian..
and examsaresoon..
for the first one..since its a male..all body cells have ofcourse XY...but for the sperms..50% have X, and 50% have Y..that is why there is a 50% chances at fertilization that its a boy or girl..
for the second..discontinous, is when there are distinct forms with no intermediates..and no environmental influence...continuous is when there are many forms with genetic and environmental influence..blood group can either be A, B, O or AB so discontinuous...and height can be literally anything...and is affected by parents height, and what we eat...so continuous...hope it helps..