Which pair of chromosomes is concerned with Down's syndrome
$7^{th}$
$18^{th}$
$21^{st}$
$23^{rd}$
(c) Trisomy of $21^{st}$ pair of chromosome.
Mendel's law were first published in the year
The best method to improve the genetic quality of mankind is
Brachydactyly is due to
Which one in man is a wholly genetic trait
$A$ : Myotonic dystrophy is caused by recessive mutant pleiotropic gene. $R$ : Gene mutation leads to more synthesis of fibrillin proteins.
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