A normal visioned woman, whose father is colour blind, marries a normal visioned man. What would be probability of her sons and daughters to be colour blind ? Explain with the help of a pedigree chart.

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Daughters will be with normal vision. But $50 \%$ of the daughters will be carrier.(normal vision) $50 \%$ of the sons will be colour blind. And $50 \%$ of the sons will be with normal vision

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Give differences : Haemophilia and Sickle-cell Anaemia
 

Person whose father is colourblind marries a lady whose mother is daughter of a colourblind man. Their children will be

$A$ : Sickel cell anaemia occurs due to the point mutation.
$R$ : $mRNA$ produced from $Hb(s)$ gene has $GAG$ instead of $GUG$.

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