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Principles Of Inheritance And Variation

Question
CBSEENBI12002528
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Which one of the following conditions of the zygotic cell would lead to the birth of a normal human female child?

  • Two X - chromosomes 

  • Only one Y- chromosomes

  • Only one X - chromosome

  • One X and one Y- chromosome

Solution

A.

Two X - chromosomes 

The sex determining mechanism in case of humans is XY type. Sperms are of two types, one containing X -chromosome and another containing Y- chromosome.

Some More Questions From Principles of Inheritance and Variation Chapter

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What term is used for the two chromatids resulting from the interchange of segments during crossing over ?

What is name of a cross in which a dominant individual is crossed with a recessive parent?

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