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
Philadelphia chromosome'' is found in the patient suffering from
Extranuclear inheritance is a consequence of presence of genes in
In a gene pool, along with beneficial mutations those mutations also exists which are damaging to an individual. It has been found that these mutations are irreversible because
$I.$ they have survival value
$II.$ they are acquired
$III.$ they are recessive and carried by heterozygous individuals only
$IV.$ they show genetic drift
Choose the incorrect option for given statement
Mendel was the native of
A cross involving two different genera is called