Edward syndrome is on account of .......
$45$ chromosomes instead of $46$
Presence of three chromosomes on $18^{th}$ pair of autosome
Presence of three chromosomes on $21^{st}$ pair of autosome
Presence of three pair of sex chromosomes
Sexual reproducation leads to
Traits controlled by genes located on autosomes are said to be
When closely placed genes on the same chromosome are inherited together the phenomenon is known as
The genes controlling seven traits in pea studied by Mendel were later found to be located on following number of chromosomes
The recessive genes located on $X$-chromosome in humans are always