A distinguishing feature of these mutants is that the abnormalities in the

A distinguishing feature of these mutants is that the

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A distinguishing feature of these mutants is that the abnormalities in the embryo depend on the genotype of the mother, not the genotype of the embryo. What is the likely cause of these mutations? A. mutation to the Hox genes. B. mutation to maternal effect genes in mother. C. mutation to Segmentation genes in father. D. Mutation to Zygotic genes in offspring.
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4. Which one do you think is the correct explanation for why developing cells gradually lose their developmental potential? A. The gene regulation hypothesis: When cells become committed to a particular developmental pathway, genes no longer needed are turned off (that is, repressed) and are difficult to turn on again. B. The genome reduction hypothesis : As cells become differentiated, they delete the DNA for genes they no longer need.
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10 out of 726 trials led to successful development to tadpole stage. Although the experiment succeeded in only 10 of 726 attempts, it showed that the nucleus of an intestinal cell and the cytoplasm of the unfertilized egg are able to support complete development of a normal animal. This result allows us to reject the hypothesis that differentiation occurs by the loss of genes. The first hypothesis—that cells become differentiated as a result of changes in gene expression—was supported.
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1. What is the name of the science fiction novel (and movie) in which teenagers Tommy and Kathy live only to be sacrificed for their organs (for their evil adult parent-clones) A. GATTACAB. Never Let Me GoC. The Maze Runner: Scorch TrialsD. 5 Feet Apart
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2. Which celebrity cloned their beloved dog and now owns two living clones of the original? ‘You can clone the look of a dog, but you can’t clone the soul. Still, every time I look at their faces, I think of my Samantha...and smile.’
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3. What do you think happened when Walter Gehring and his team engineered Pax6 to operate in the antenna of fruit flies? A. The fly still developed normal eyes only in the healthy wild-type location on the face. B. The fly developed tiny eyes on the ends of its antennae. C. The fly developed eyes instead of antennae. D. The fly embryo died due to the lethal nature of this mutation.
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Fruit flies with the Pax-6 gene added to the antennal program developed tiny eyes on the ends of their antennae. Pax6, a control switch regulating eye development. (a) Normal fly antenna; (b) eye tissue induced by expression of fruit fly Pax6 in the antenna; (c) eye tissue induced by expression of mouse Pax6 in the antenna.
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4. What do you think happened when the fruit fly Pax-6 was replaced with mouse Pax-6? A. The fruit flies developed tiny mouse eyes. B. The fruit flies died due the radical change of this introduced mutation. C. The fruit flies did not develop any eyes at all. D. The fruit flies developed normal fruit fly eyes.
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Fruit flies with mouse Pax-6 still developed normal fruit fly eyes Pax6, a control switch regulating eye development. (a) Normal fly antenna; (b) eye tissue induced by expression of fruit fly Pax6 in the antenna; (c) eye tissue induced by expression of mouse Pax6 in the antenna.
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  • Spring '11
  • Sweat
  • Evolution, Zygosity, eye cancer, B. Analogy

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