One of the genes present exclusively on the $X$-chromosome in humans is concerned with
Baldness
Red-green colour blindness
Facial hair/moustaches in males
Night blindness
The pedigree chart given below shows a particular trait which is absent in parents but present in the next generation irrespective of sexes. Draw your conclusion on the basis of the pedigree.
If a normal woman marries a colourblind man, their
Which of the following is a genetic disease
Which one of the following symbols and its representation, used in human pedigree analysis is correct?
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