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A woman has only daughters. Analyse ...

A woman has only daughters. Analyse the situation genetically and provide a suitable explanation.

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The sex of a child depends on the type of male gamete (sperm) as the man produces sperms with either X or Y-chromosome. If a sperm carrying X-chromosome fertilises the ovum (female gamete with X-chromosome), then the child born will be a girl. This is because the child will have XX pair of sex chromosome. A woman has only daughters. This indicates that in child will have XX pair of sex chromosome. A woman has only daughters. This indicates that in every fusion, the sperm carrying X-chromosome fertilised the ovum.
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