A person may have one gene for normal haemoglobin and one gene for sickle cell haemoglobin. This heterozygous condition is called
Genome
Anaemia
Gene trait
Sickle cell trait
In pedigree analysis, the square, blackened and horizontal lines represents
In pedigree analysis, symbol given for sex unspecified is
A man known to be victim of haemophilia marries a normal woman whose father was known to be a bleeder. Then it is expected that
Haemophilia, a $X$-linked recessive disease is caused due to deficiency of