"The sex of a newborn child is a matter of chance and none of the parents may be considered responsible for it." Justify this statement with the help of a flowchart showing the determination of the sex of a newborn.

The hemizygous males produce two kinds of gametes, 1/2 gametes with X- and 1/2 with Y-chromosome (22 A + X and 22 A + Y). Fertilization of egg (22 + X) with sperm carrying 22+X chromosomes results in a female child (44A + XX). Fertilization of egg (22 + X) with a sperm carrying 22+Y chromosomes results in a male child (44A + XY).

44 + XX (Female)
44 + XY (male)
22+X 22+X
22+X 44 + XX(Girl) 44 + XX(Girl)
22+Y 44 + XY(boy) 44 + XY(boy)