Question

Condition with no phenotypic expression is called
(A) Intragenic expression
(B) Genetic expression
(C) Both A and B
(D) None of the above

Answer 1

Hint: The expression of the morphological characters in an individual with respect to its genetic character is called the phenotypic expression. During the process of growth and development, the phenotypic characters may change.

Complete Answer:
- Phenotypic type of expression shows the observational features of an organism. Genetic expression is defined as the process in which the information from the gene is used in the production of the gene product.
- These formed products are most probably proteins. The protein produced by the gene helps to change the particular character. In some cases, the non-protein genes such as RNA, the product of the gene, are the functional RNA compounds.

This process of gene expression involves two processes. The first process is the transcription which is the production of the messenger RNA. The second process is the processing which is the processing of the messenger RNA produced by the process of transcription. The resulting RNA molecule of the gene expression is the mRNA. Hence the condition with no phenotypic expression is called genetic expression.

Thus, the option (B) is correct.

Note: The example of the gene expression is used in the control of the insulin expression, cyclin expression etc. The insulin expression thus produced gives the signal for the increase in the blood glucose level. The cyclin expression controls the level of the progression through the cycle of the eukaryotic cell.