Generation of non-parental gene combinations is termed as

The recessive genes located on $X$-chromosome in humans are always

Genes for cytoplasmic male sterility in plants are generally located in

Mark the odd one w.r.t. syndrome which occur due to failure of segregation of homologous pair of chromosomes during cell division cycle.

The mule is a

All the sons are haemophilic and daughter are normal of a haemophilic father and normal mother. This character is