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Questions and Answers
What is the role of Torso mRNA laid down by the mother?
What is the role of Torso mRNA laid down by the mother?
- Controls the trunk region of the embryo
- Regulates polarity after fertilization
- Specifies terminal ends of the embryo (correct)
- Activates Bicoid and Nanos genes
Which maternal effect gene is responsible for setting up the anterior-posterior (A-P) axis in Drosophila?
Which maternal effect gene is responsible for setting up the anterior-posterior (A-P) axis in Drosophila?
- Hunchback
- Caudal
- Bicoid (correct)
- Nanos
What happens in embryos when there is a mutation in the Nanos gene?
What happens in embryos when there is a mutation in the Nanos gene?
- Both ends of the embryo are affected
- The trunk region is not specified
- Embryos lack a head region
- Embryos lack a tail region (correct)
How do Bicoid and Nanos proteins influence downstream target genes?
How do Bicoid and Nanos proteins influence downstream target genes?
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Which gene specifies terminal ends by acting as a ligand for the Torso receptor tyrosine kinase?
Which gene specifies terminal ends by acting as a ligand for the Torso receptor tyrosine kinase?
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What is the outcome of embryos from homozygous mutant mothers affecting the Torso gene?
What is the outcome of embryos from homozygous mutant mothers affecting the Torso gene?
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