if you replaced the hox genes that are normally expressed in a dolphin fin with the hox genes that are normally expressed in a cat's paw, you would get a dolphin with kitty cat paws. ( True or false)
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if you replaced the hox genes that are normally expressed in a dolphin fin with the hox genes that are normally expressed in a cat's paw, you would get a dolphin with kitty cat paws. ( True or false)
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- An adult human has a flat face with a small jaw and large cranium. An adult chimpanzee has a large jaw and small cranium. Both juvenile chimps and humans have heads similar to adult humans. Which of the following is a reasonable explanation for this pattern? Group of answer choices A) genes that modify skull shape are not expressed in chimps during development B) head shape is controlled by cytoplasmic determinants C)genes that modify skull shape are not expressed in humans during development D) chimps and humans have completely different genes controlling the formation of the headWhich statement about Hox genes is false? a. They are expressed in similar patterns in the embryos of both mice and flies. b. They include a conserved region of base pairs called the homeobox. c. They are arranged in similar clusters of genes in both mice and flies. d. They are part of the so-called genetic toolkit. e. Because of their important functional roles, they evolved rapidly in both mammals and flies.Some uninformed people might argue that studying the development of an obscure little fish like the threespine stickleback is a waste of time and money. Why would biologists study the genes that control development in stickleback fish? Give some reasons
- MAKE A simple sketch and label characteristics Choose a human-related organism to study. As you consider strategies to enhance the social value of this organism, think of other desirable attributes that may be added to it. Imagination is a powerful tool, so let it go wild and imagine that you can transfer genes across other animals. For example: A gene from a firefly has been transferred into tobacco plants so that they may glow in the dark, as demonstrated by geneticists. Tobacco pests are less likely to attack at night because of this.If this model continues, with no major changes to the environment, what do you expect to happen? A) rabbits will continue to get lighter over time B) there is no way to predict because mutations are random C) mutations will all die out leaving only the original fur color D) dark gray fur will become the common phenotype because it favors survivalWhat is NOT an example of antagonistic pleiotropy? A. Developmental genes that code for greater or fewer than seven cervical vertebrae have negative fitness costs. B. Genes that create insect breathing tubes cause decreased production of growth hormones. C. Mutations that confer resistance to Bt also make insects more vulnerable to natural plant defensive chemicals. D. Two of the three choices are correct.
- A mutation in the control region of a Hox gene that is normally expressed in the thorax causes the Hox gene to be expressed in the abdomen. What is a possible consequence of this mutation? ANSWER CHOICES A. Group of answer choices B. Eyes growing on the thorax C. Legs growing on the head D. Eyes growing on the abdomen E. Legs growing on the abdomenUsing a mouse as a model organism to study a multigenic order like type two diabetes is a waste of researchers’ time since mice do not contain the same genes found in humans. Agree/Disagree? Answer and explain here:Which is not possible? You can insert jellyfish genes into mice and make them glow-in-the-dark You can insert spider silk genes into goats; the goats will produce spider silk Human insulin genes can be inserted into bacteria; the bacteria produce human insulin All are possible.
- Which of the following statements is incorrect? a. Some gene expression patterns can be passed to an individual's offspring. b. Expression of a master regulator triggers a gene expression cascade. c. X chromosome inactivation is necessary for normal development of male mammals.Often successful domestication of a plant or animal is due to the fact that this involved just a few gene changes. In what situation can changes in just a few genes dramatically change an organism's entire appearance?You are working in a lab that studies stickleback fish. These fish normally have three spines that occur on the back of the stickleback. One day you notice that a young stickleback has no spines on its back but instead has three spines growing out of the top of its head! (answer both questions) question 1: A mutation in what type of gene is probably the cause of this unusual situation? Why? question #2: would you expect the proteins that make the spines to be different in the mutant fish compared to a wildtype fish. Why or why not?
