The grafting between two identical twins is known as
Allograft
Autograft
Isograft
Xenograft
Which is the example of supplementary gene
Linked gene are present on
Mental retardation in man, associated with sex chromosomal abnormality is usually due to
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
Genes exhibiting multiple effects are known as