Question

Which statement about pseudogenes is true?

In some gene families, there appears to be little selection pressure for the deletion of pseudogenes. These families have few pseudogenes. Pseudogenes usually arise from gain-of-function mutations. In some gene families, there appears to be little selection pressure for the deletion of pseudogenes. These families can have many pseudogenes. Pseudogenes generally look very different from functional genes. There must be more functional genes than pseudogenes in a gene family.

Answer 1

Ans : Pseudogenes usually arise from gain-of-function mutations.

Pseudogenes : Pseudogenes is one of the functional gene which had  loosed its functional protein or introns, promotors due to mutation.

• opt A : In some gene families, there appears to be little selection pressure for the deletion of pseudogenes. These families have few pseudogenes.

Some gene family may carry pseudogenes .but this not the right statement for the given question

• opt B: Pseudogenes usually arise from gain-of-function mutations.

It resultant of mutation as mentioned above.

• opt C:In some gene families, there appears to be little selection pressure for the deletion of pseudogenes. These families can have many pseudogenes.

Actually its a mutant gene

• opt D:Pseudogenes generally look very different from functional genes.

Its Also a functional gene but mutated.

• opt E:There must be more functional genes than pseudogenes in a gene family.

Yes there are functional gene in gene family But this is not the right answer for the given question