Question

Considering that males are produced by klinefelter (XXY)syndrome, XYY, and normal XY chromosomal combination and females are produced by Turner (XO) syndrome, poly-X (XXX,XXXX) and normal XX combinations it is obvious that
A. maleness results from the presence of only one X chromosome
B. maleness results from the absence of two or more X chromosome.
C. maleness results from the minimal presence of two or more X chromosomes
D. femaleness results from the presence of two or more X chromosomes.
E. sex determination is a delicate balance between XandYchromosomes

Answer 1

Consider that males are produced by klinefelter (XXY)syndrome, XYY, and normal XY chromosomal combination and females are produced by Turner (XO) syndrome, poly-X (XXX,XXXX) and normal XX combinations.

The above shows that the moment one inherits the Y chromosome from Dad, we have a male, and a female otherwise. Hence,

A. maleness results from the presence of only one X chromosome (not true in the case of Klinefelter's syndrome)
B. maleness results from the absence of two or more X chromosome. (not true in the case of Klinefelter's syndrome)
C. maleness results from the minimal presence of two or more X chromosomes (nothing suggests this)
D. femaleness results from the presence of two or more X chromosomes. (not true in the case of Turner's syndrome)
E. sex determination is a delicate balance between X and Y chromosomes (that's the only deduction we can make, I guess)