73.Which condition of zygote cell will lead to birth of a normal human female child? A. One X-chromosome B. One X & one Y chromosome C. Two X chromosome D. One Y chromosome
Option c. Females typically have two of the same kind of sex chromosome (XX), and are called the homogametic sex. Males typically have two different kinds of sex chromosomes (XY), and are called the heterogametic sex. Exceptions to this are cases of XX males or XY females, or other syndromes in case of other organisms. So the correct option is 'two X-chromosomes'.
