A marriage between normal visioned man and colourblind woman will produce which of the following types of offsprings
Normal sons and carrier daughters
Colourblind sons and carrier daughters
Colourblind sons and $50\%$ carrier daughters
$50\%$ colourblind sons and $50\%$ carrier daughters
In pedigree analysis, the square, blackened and horizontal lines represents
A colourblind daughter is born when
Which of the following abnormalities is due to autosomal dominant mutation?
Sickle -cell anaemia has not been eliminated from the African population because it
Sickle cell-anaemia disorder arises due to