The UG4 gene is expressed in stem tissue and leaf tissue of the p...

Question

The UG4 gene is expressed in stem tissue and leaf tissue of the plant Arabidopsis thaliana. To study mechanisms regulating UG4 expression, six small deletions of DNA sequence upstream of the gene-coding sequence are made. The locations of deletions and their effect on UG4 expression are shown here.

Why does deletion D raise UG4 expression in leaf tissue but not in stem tissue?

Accepted Answer

Hello, everyone and welcome to today's video. So which of the following disorders is caused by a mutation in the S M N one gene, which is responsible for the production of a protein essential for the maintenance and survival of these motor neurons. As answer choice. A we have Down Syndrome as answer choice B, we have Turner syndrome as answer choice C. We have spinal muscular atrophy and as an choice D we have Huntington's disease. Well, in order to solve this problem, let's go over each of these answer choices and just determine what is going to cause each disease. Let's begin by Down Syndrome or as you all know Down Syndrome is going to be a chromosomal abnormality where an extra chromosome is going to be found in the organism that is not going to be related to this S M N one gene. So we're going to cancel it out. Then we have B which is Turner syndrome and Turner's Syndrome is going to be caused by an incomplete or missing X chromosome. Again, nothing to do with the S M one gene. So we're going to cancel it out also. Then we have Huntington's disease. And Huntington's disease is going to be caused by a mutation in a gene called the hunting gene, which is not going to be these S M N one gene. So we're going to also cancel this out. Finally, we have spinal muscular atrophy and spinal muscular atrophy is in fact going to be caused by, by a mutation in the S M N one gene, which is responsible for the production of this protein that is said to be essential for the maintenance and survival of motor neurons. Now, because of that, we're going to highlight answer choice c spinal muscular atrophy as a correct answer for this question, I really hope this helped you and I hope to see you on the next one.

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