The theory where ratio between the number of $X$-chromosomes and number of complete sets of autosomes will determine the sex is known as
Chromosome theory of sex determination
Genic balance theory of sex determination
Hormonal balance theory of sex determination
Environmental sex determination theory
Number of autosomal chromosomes in Drosophila
The fruit shape in tomato is an example of
What are the characteristic features of a true-breeding line ?
Mark the correct statement (w.r.t. sickle cell-anaemia)
Experimental evidence of chromosomal theory of inheritance was given by