Question

You are a graduate student in the lab of a famous fly geneticist. You need to analyze a batch of mutant flies that were recently created in her laboratory to identify the single gene that is most likely mutated in each of the flies.

Drag the mutations on the left to the appropriate blanks on the right to complete the sentences.

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hunchback (a gap gene)
even-skipped (a pair-rule gene)
wingless (a segment-polarity gene)
knirps (a gap gene)
hedgehog (a segment-polarity gene)
Kruppel (a gap gene)
1. The wings are missing in mutant fly L, which is likely the result of a mutation in________  .
2. Mutant fly X has lost the head and thorax. The gene most likely responsible for this mutation is____________.
3. Thoracic and abdominal structures are missing in mutant fly Q. The gene most likely responsible for this mutation is__________  .
4. Mutant fly F has predominantly lost abdominal structures, which is likely the result of a mutation in _________  .
5. The mutation observed in mutant fly O resulted in defects within the anterior or posterior regions of each segment. The gene that most likely caused this mutation is  _________.
6. Segment-sized sections of every other segment are missing in mutant fly Z. One likely candidate gene is ________ .

Answer 1

1. The wings are missing in mutant fly L, which is likely the result of a mutation in wingless (a segment-polarity gene 2 Mutant fly X has lost the head and thorax. The gene most likely responsible for this mutation IS- hunchback (a gap gene) 3. Thoracic and abdominal structures are missing in mutant fly Q. The gene most likely responsible for this mutation is. Kruppel (a gap gene) 4. Mutant fly F has predominantly lost abdominal structures, which is likely the result of a mutation in Knirps (a gap gene) 5. The mutation observed in mutant fly O resulted in defects within the anterior or posterior regions of each segment. The gene that most likely caused this mutation is hedgehog (a segment-polarity gene) 6. Segment-sized sections of every other segment are missing in mutant fly Z. One likely candidate gene is even-skipped (a pair-rule gene)

1. The wingless gene is a type of Segment polarity gene, which is responsible for the regulation of transcription for the product resulting in the development of anterior or posterior regions of each segment. The mutation in the wingless gene resulted in missing wings in the flies' phenotype. 2. The hunchback gene is a type of gap gene (which is responsible for the regulation of transcription for the product resulting in the development of the embryo). The mutation in the gap genes results in the gaps in the embryo, resulting in the missing of many adjacent segments in phenotype. The mutation in the hunchback gene resulting in the missing head segments in the fly phenotype. 3. The Kruppel gene is a type of gap gene (which is responsible for the regulation of transcription for the product resulting in the development of the embryo). The mutation in the gap genes results in the gaps in the embryo, resulting in the missing of many adjacent segments in phenotype. The mutation in the Kruppel gene resulting in the lack of Thoracic (Tl) to Abdomen (A5) segments in the fly phenotype. 4. The knirps gene is a type of gap gene (which is responsible for the regulation of transcription for the product resulting in the development of the embryo). The mutation in the gap gene results in the gaps in the embryo, resulting in the missing of many adjacent segments in phenotype. The mutation in the knirps gene resulting in the lack of posterior segments in the fly phenotype. 5. The hedgehog gene is a type of Segment polarity gene, which is responsible for the regulation of transcription for the product resulting in the development of anterior or posterior regions of each segment. The mutation in the hedgehog gene resulted in defects within the anterior or posterior regions of each segment of flies' phenotype. 6. The even-skipped is a type of pair-rule gene (which is responsible for the regulation of transcription for the product resulting in the development of parasegments). The mutation in the pair-rule genes resulting in only half the number of parasegments due to missing of every other parasegment. The mutation in the even-skipped gene resulting in the lack of even-numbered parasegments from the flies' phenotype.