One of the following is sex-influenced character
Appearence of beard
Baldness in male
Docile behaviour of female
Low $BMR$ in female
$I.Q.$ is the ratio of mental age to
Genetic counsellors can identify heterozygous individuals by
Which one of the following is a physical factor that induce mutation?
The $F_2$ dihybirid ratio $9 : 3 : 4$ is explained on the basis of
Mendel published his work on inheritance of characters in $1865$ but it remained unrecognised till $1900$ because
$(a)$ He could not provide any physical proof for the existence of factors
$(b)$ His concept of factors as stable, discrete units that controlled the expression of traits did not find acceptance from the contemporaries
$(c)$ Mendel's approach of using mathematics to explain biological phenomena was totally old
$(d)$ Communication was not easy (as it is now)