Colour blindness results from
Absence of rods
Absence of cones
Absence of eyelids
Inverted retina
Study the given pedigree chart and select the correct option of the given question.
$(1)$ Is the trait recessive of dominant ?
$(2)$ is the trait sex linked or autosomal ?
Which of the following is not true of haemophilia?
Which of the following is an example of sex-linked disease?
In pedigree analysis, symbol given for sex unspecified is
Which of the following occurs due to the presence of autosome linked dominant trait?