Absence of bicoid mRNA from a Drosophila egg leads to the absence of anterior larval body parts and mirror-image duplication of posterior parts. This is evidence that the product of the bicoid gene ________.
A) normally leads to formation of head structures
B) normally leads to formation of tail structures
C) is transcribed in the early embryo
D) is a protein present in all head structures

Question

Quizplus · Accepted Answer

Bicoid is a maternal effect gene that encodes a protein responsible for establishing the anterior-posterior axis in Drosophila. Its absence leads to the lack of anterior structures, indicating its role in head formation.

Absence of Bicoid MRNA from a Drosophila Egg Leads to the Absence