$A$ : Holandric traits are passed from one generation to the next generation.
$R$ : These traits appear more frequently in one sex than in other.

The following diagram shows two chromosomes and the lettered number represents the genes

chromosome $1$ : 

chromosomes $2$ :

Which of the following would result if a translocation occurred between chromosome $1$ and $2 ?$

In human female, barr bodies are formed by

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

Lethal genes are