NEET 2011 Biology question

Which one of the following conditions of the zygotic cell would lead to the birth of a normal human female child ?

(1)two X chromosomesCorrect
(2)only one Y chromosome
(3)only one X chromosome
(4)one X and one Y chromosome

Answer: (1)

Solution

In humans sex is determined by the sex chromosomes: XX (two X chromosomes) gives a normal female, XY gives a normal male. So a zygote with two X chromosomes develops into a

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Question ID VK-090731