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In an experiment involving Drosophila development, a large amount of purified bicoid mRNA was injected into the posterior end of a wild-type embryo, the resulting developing embryo will have
- a)normal development with one each of head, thorax and abdomen.
- b)head in the middle with two thoraces and two abdomens
- c)a head with two thoraces and anabdomen
- d)two heads and two thoraces with an abdomen segment in the middle
Correct answer is option 'D'. Can you explain this answer?
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In an experiment involving Drosophila development, a large amount of p...
Introduction:
The question pertains to an experiment involving the injection of purified bicoid mRNA into the posterior end of a wild-type Drosophila embryo. The bicoid gene plays a crucial role in the patterning of the anterior-posterior axis in Drosophila development. The injection of a large amount of bicoid mRNA in a specific region of the embryo can lead to alterations in the normal pattern of development.
Explanation:
When a large amount of purified bicoid mRNA is injected into the posterior end of a wild-type embryo, the resulting developing embryo will exhibit the following characteristics:
1. Two Heads:
The injected bicoid mRNA will lead to the formation of an additional head structure at the posterior end of the embryo. This is because bicoid mRNA encodes for a protein that acts as a morphogen gradient, with high concentrations at the anterior end of the embryo. By injecting bicoid mRNA at the posterior end, an additional source of the protein is introduced, resulting in the formation of a second head structure.
2. Two Thoraces:
As a consequence of the altered pattern of bicoid mRNA expression, the developing embryo will also exhibit two thoracic segments instead of the normal one. The thoracic segments are the segments that give rise to the middle part of the body, where the wings and legs are formed.
3. One Abdomen Segment:
In the experiment, the injected bicoid mRNA is localized to the posterior end of the embryo. This leads to a concentration gradient of the protein, with the highest concentration at the posterior end. As a result, the anterior region of the embryo lacks the necessary concentration of bicoid protein for proper development. Consequently, only one abdomen segment is formed in the middle, between the two thoraces.
Conclusion:
In summary, the injection of a large amount of purified bicoid mRNA into the posterior end of a wild-type Drosophila embryo results in the formation of two heads, two thoraces, and one abdomen segment in the middle. This is due to the altered expression pattern of the bicoid protein, which affects the normal patterning of the anterior-posterior axis during Drosophila development.
The question pertains to an experiment involving the injection of purified bicoid mRNA into the posterior end of a wild-type Drosophila embryo. The bicoid gene plays a crucial role in the patterning of the anterior-posterior axis in Drosophila development. The injection of a large amount of bicoid mRNA in a specific region of the embryo can lead to alterations in the normal pattern of development.
Explanation:
When a large amount of purified bicoid mRNA is injected into the posterior end of a wild-type embryo, the resulting developing embryo will exhibit the following characteristics:
1. Two Heads:
The injected bicoid mRNA will lead to the formation of an additional head structure at the posterior end of the embryo. This is because bicoid mRNA encodes for a protein that acts as a morphogen gradient, with high concentrations at the anterior end of the embryo. By injecting bicoid mRNA at the posterior end, an additional source of the protein is introduced, resulting in the formation of a second head structure.
2. Two Thoraces:
As a consequence of the altered pattern of bicoid mRNA expression, the developing embryo will also exhibit two thoracic segments instead of the normal one. The thoracic segments are the segments that give rise to the middle part of the body, where the wings and legs are formed.
3. One Abdomen Segment:
In the experiment, the injected bicoid mRNA is localized to the posterior end of the embryo. This leads to a concentration gradient of the protein, with the highest concentration at the posterior end. As a result, the anterior region of the embryo lacks the necessary concentration of bicoid protein for proper development. Consequently, only one abdomen segment is formed in the middle, between the two thoraces.
Conclusion:
In summary, the injection of a large amount of purified bicoid mRNA into the posterior end of a wild-type Drosophila embryo results in the formation of two heads, two thoraces, and one abdomen segment in the middle. This is due to the altered expression pattern of the bicoid protein, which affects the normal patterning of the anterior-posterior axis during Drosophila development.
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In an experiment involving Drosophila development, a large amount of purified bicoid mRNA was injected into the posterior end of a wild-type embryo, the resulting developing embryo will havea)normal development with one each of head, thorax and abdomen.b)head in the middle with two thoraces and two abdomensc)a head with two thoraces and anabdomend)two heads and two thoraces with an abdomen segment in the middleCorrect answer is option 'D'. Can you explain this answer?
Question Description
In an experiment involving Drosophila development, a large amount of purified bicoid mRNA was injected into the posterior end of a wild-type embryo, the resulting developing embryo will havea)normal development with one each of head, thorax and abdomen.b)head in the middle with two thoraces and two abdomensc)a head with two thoraces and anabdomend)two heads and two thoraces with an abdomen segment in the middleCorrect answer is option 'D'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about In an experiment involving Drosophila development, a large amount of purified bicoid mRNA was injected into the posterior end of a wild-type embryo, the resulting developing embryo will havea)normal development with one each of head, thorax and abdomen.b)head in the middle with two thoraces and two abdomensc)a head with two thoraces and anabdomend)two heads and two thoraces with an abdomen segment in the middleCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In an experiment involving Drosophila development, a large amount of purified bicoid mRNA was injected into the posterior end of a wild-type embryo, the resulting developing embryo will havea)normal development with one each of head, thorax and abdomen.b)head in the middle with two thoraces and two abdomensc)a head with two thoraces and anabdomend)two heads and two thoraces with an abdomen segment in the middleCorrect answer is option 'D'. Can you explain this answer?.
In an experiment involving Drosophila development, a large amount of purified bicoid mRNA was injected into the posterior end of a wild-type embryo, the resulting developing embryo will havea)normal development with one each of head, thorax and abdomen.b)head in the middle with two thoraces and two abdomensc)a head with two thoraces and anabdomend)two heads and two thoraces with an abdomen segment in the middleCorrect answer is option 'D'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about In an experiment involving Drosophila development, a large amount of purified bicoid mRNA was injected into the posterior end of a wild-type embryo, the resulting developing embryo will havea)normal development with one each of head, thorax and abdomen.b)head in the middle with two thoraces and two abdomensc)a head with two thoraces and anabdomend)two heads and two thoraces with an abdomen segment in the middleCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In an experiment involving Drosophila development, a large amount of purified bicoid mRNA was injected into the posterior end of a wild-type embryo, the resulting developing embryo will havea)normal development with one each of head, thorax and abdomen.b)head in the middle with two thoraces and two abdomensc)a head with two thoraces and anabdomend)two heads and two thoraces with an abdomen segment in the middleCorrect answer is option 'D'. Can you explain this answer?.
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