If the ratio between $X$-chromosomes and complete set of autosome is $0.5$. Then the individual will be

Self sterility in "Nicotiana'' was reported by

Genes exhibiting multiple effects are known as

The genes controlling seven traits in pea studied by Mendel were later found to be located on following number of chromosomes

Mark the correct match

In man the mutation disease ‘Aniridia' $(Congenital\, absence \,of\, iris)$ occurs due to