Which of the following are most abundant types of antibodies
$IgA$
$IgE$
$IgG$
$IgM$
Continuous variations are attributed to
In a mutational event, when adenine is replaced by guanine, it is the case of
In Turner's syndrome
Mark the odd one w.r.t. syndrome which occur due to failure of segregation of homologous pair of chromosomes during cell division cycle.
The traits controlled by the genes located on $X$ chromosome of human beings are said to be