In the given pedigree, indicate whether the shaded symbols indicate dominant or recessive allele.
Recessive
Codominant
Dominant
It can be recessive or dominant both
Thalassaemia is
What is pedigree analysis? Suggest how such an analysis, can be useful.
Following characters are indicate
$(i)$ presence of sickle - shaped $RBC$
$(ii)$ Blood not clot, non stop bleeding
$(iii)$ The heterozygous female transmit the disease to sons.
$(iv)$ Both heterozygous parents transmit the disease to offspring
A colourblind man has a colourblind sister but a normal brother than phenotype of its parents is