2018 11 19 with answer.docx - 11\/24 quiz 1 A scientist studies the mechanism of a gene named A during fly development Normal development Abnormal

2018 11 19 with answer.docx - 11/24 quiz 1 A scientist...

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11/24 quiz 1. A scientist studies the mechanism of a gene named A during fly development. a. What will be the phenotype of fertilized egg (i) and (ii)? Explain your answer. Mother’s genotype is Aa, so normal protein from the allele A can be deposited to the egg, so both (i) and (ii) will develop normally. b. She found that the mRNA transcript of gene A is localized to the anterior region of wild- type fly embryo. Predict what she would find in the anterior region of embryos in Exp. II. The transcript from allele a will be found in the anterior region of the fertilized egg. However, no functional protein will be generated from the transcript. c. What will happen when she injects A mRNA transcripts into the posterior region of wild- type embryo? The injected embryo may develop anterior feature in the posterior region such as head and brain.. 2. The graphs below show the levels of mRNA or proteins of four genes that are essential for the early fly embryo development. nanos and bicoid are maternal effect genes, while
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