Several of the different globin genes are expressed in humans, but at different times in development. Which of the listed mechanisms could allow for this?
A) exon shuffling
B) pseudogene activation
C) differential translation of mRNAs
D) differential gene regulation over time

Question

Quizplus · Accepted Answer

Differential gene regulation over time would allow for the different globin genes to be expressed at different times in development. This could occur through changes in transcriptional regulation, such as the binding of specific transcription factors or changes in chromatin structure. Exon shuffling would not be relevant in controlling the timing of globin gene expression, as it involves the recombination of genetic material from different genes. Pseudogene activation is also unlikely to play a role, as pseudogenes are non-functional copies of genes that do not contribute to protein synthesis. Differential translation of mRNAs could potentially affect the levels of globin protein produced, but would not control which globin genes are expressed at which times in development.

Several of the Different Globin Genes Are Expressed in Humans