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)
$(a), (b) \;\& \;(c) $are correct
$(c) \;\& \;(d)$are correct
$(a), (b) \;\&\; (d)$ are correct
Only $(a)$ is correct
Haemophilia is caused due to lack of
Mendelism was rediscovered by
$I.$ Morgan
$II.$ De Vries
$III.$ Correns
$IV.$ Tschermark
Choose the correct option
$MN$ factors are due to
Mendel proposed which of the following term for hereditary units
If a diploid cell is treated with colchicine, then it becomes