Question

If in a zygote, a housekeeping gene is corrected with the help of biotechnology, then
(A) the corrected gene is present in all its cell
(B) all the cells contain the transcript of the corrected gene
(C) the corrected gene is present in some cells only
(D) the corrected gene is present as euchromatin

Choose the correct option.

• A. A, B, C
• B. B, C, D
• C. A, C, D
• D. A, B, D

Answer 1

The correct option is D A, B, D

A zygote is a totipotent stem cell having the capacity to form an entire organism. If the gene is corrected in the zygote it must be present in all the cells of the organism. As it is a housekeeping gene, it must be expressed in all cells all the time thus all the cells contain the transcripts of the corrected gene and it is a part of the euchromatin. Euchromatin is the transcriptionally active form of chromatin.