What is cancer and why does it happen?
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Answer:
II and III
Explanation:
<em>I. All sons of these parents will be a hemophiliac. </em>
<em> II. A son who suffers from hemophilia received the hemophilia allele from his mother. </em>
<em> III. Half of the daughters of this cross are predicted to be hemophiliacs.</em>
Assuming the haemophilia allele is represented by h, the alternate form being H.
A woman that is a carrier will have the genotype .
A man who suffers from haemophilia will have the genotype
Crossing both of them:
x
=
From the result of the cross, the following can be deduced:
- Half or 50% of the sons from the couple will be haemophiliacs.
- Any son that suffers from haemophilia received the allele from the mother.
- Half or 50% of the daughters from this cross will be hemophiliacs.
Hence, statements II and III are true.