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Describe if the following homozygous mutant plants will undergo the triple response in the presence and...

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Biology

Describe if the following homozygous mutant plants will undergothe triple response in the presence and absence of ethylene.Briefly explain your answer.

A. A recessive mutation (loss-of-function) in the EIN3gene. This recessive mutation results in EIN3 being unable toactivate the expression of ethylene inducible genes.

B. A recessive mutation (loss-of-function) in one ethylenereceptor gene (ETR1). This recessive mutation resulted inan ETR1 protein that is unable to activate CTR1.

C. A dominant mutation (gain-of-function) in one ethylenereceptor gene (ETR1). This dominant mutation results in anETR1 protein that is unable to bind ethylene.

D. A dominant mutation (gain-of-function) in EIN2. This dominantmutation results in an EIN2 protein that cannot be phosphorylatedby CTR1.

Answer & Explanation Solved by verified expert
3.8 Ratings (442 Votes)
Answer The triple response is induced by ethylene gas in the plants under certain environmental conditions The model organisms used to study the phenomenon are Pisum sativum and Arabidopsis thaliana When there is no light the plants start to produce a high concentration of ethylene gas a phytohormone Under experimental conditions the seeds of the plant Arabidopsis were incubated to investigate the effect of ethylene gas production To the surprise of investigators it was found that there is a reduction in the length of stem as well as the inhibition of shoot induction In contrast    See Answer
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