What factor does NOT contribute to establishment of the hunchback gradient in the Drosophila embryo? O a. maternal source of hunchback mRNA O b.nanos O c. bicoid O d. caudal
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- A drug causes the degradation of Cactus protein. What would be the effect of administering this drug to developing Drosophila embryos?Referring to the diagram below explain how Drosophila segmentation is set up in the parasegments and how this is reflected in the mature segments. (a) Explain the signals (wingless, Hh, Serrate) how they are sent and received (b) what is the interaction between these signals and (c) how do these set up the final denticle pattern in the mature segment. asap pleaseThere is a gene in the fruit fly (Drosophila) called antennepedia. It controls the formation of which structures? What happens when it is
- What is the difference between a maternal-effect gene and a zygotic gene? Of the following genes that play a role in Drosophila development, which are maternal-effect genes and which are zygotic? Explain your answer. A. nanos B. Antp C. bicoid D. labDescribe key events in early Drosophila developmentthat occur before segmentation is first apparent.What would be the most likely effect on development of puncturing the posterior end of a Drosophila egg, allowing a small amount of cytoplasm to leak out, and then injecting that cytoplasm into the anterior end of another egg?
- If a fertilized Drosophila egg is punctured at the anterior end and a small amount of cytoplasm is allowed to leak out, what will be the most likely effect on the development of the fly embryo?Compare and contrast how maternal-effect genes, gap genes, and homeotic genes affect Drosophila development.In mice, the copy of the Igf2 gene that is inherited from the mother isnever expressed in her offspring. This happens because the Igf2 genefrom the mothera. always undergoes a mutation that inactivates its function.b. is deleted during oogenesis.c. is deleted during embryonic development.d. is not transcribed in the somatic cells of the offspring.
- Describe the expression pattern of the Drosophila geneeve in the early embryo.Explain what a morphogen is, and describe how it exerts its effects. What do you expect will happen when a morphogen is expressed in the wrong place in an embryo? List five examples of morphogens that function in Drosophila.Molecular geneticists have performed experiments in which they altered the number of copies of the bicoid gene in flies, affecting the amount of Bicoid protein produced. a. What would be the effect on development of an increased number of copies of the bicoid gene? b. What would be the effect of a decreased number of copies of bicoid? Justify your answers.