Given below is pedigree chart showing the inheritance of a certain trait in human. Select the correct option for the given chart
Autosomal dominant trait
Autosomal recessive trait
Sex linked recessive
Sex linked dominant
$A$ - Sickle-cell anaemia is sex linked recessive trait
$R$ - This disease is controlled by more that two pair of alleles
The most striking example of point mutation is found in a disease called
Haemophilia $A$ is due to the absence of
Choose correct option.
$(i)$ The heterozygous female transmit the disease to son.
$(ii)$ Change in the shape of the $RBC$ from biconcave disc to elongated sickle like structure.
$(iii)$ Mentally retarded.
$(iv)$ Heamoglobin not formed proper amount in blood.
Assertion : Haemophilia is a recessive sex linked disease.
Reason : Haemophilia occurs due to mutation of a structural gene on chromosome $15$.