Which pair of chromosomes is concerned with Down's syndrome
Which pair of chromosomes is concerned with Down's syndrome
- [AIPMT 2002]
- A
$7^{th}$
- B
$18^{th}$
- C
$21^{st}$
- D
$23^{rd}$
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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
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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