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6. Additional objective type questions on sex-determination system

Choose the suitable answer for the given questions:

1. The maleness of a child is determined by

The Y chromosome in zygote
The X chromosome in the zygote
The cytoplasm of germ cell which determines the sex
Sex is determined by chance

2. The number of pairs of sex chromosomes in the zygote of humans is

Four
Three
One
Two

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