Which of the following examples is likely to be caused by asomatic mutation?A. A purple flower has a small patch of white tissue.B. One child, in a family of seven, is an albino.C. One apple tree, in a very large orchard, produces its apples 2weeks earlier than any of the other trees.D. A 60-year-old smoker develops lung cancer.
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Which of the following examples is likely to be caused by a
somatic mutation?
A. A purple flower has a small patch of white tissue.
B. One child, in a family of seven, is an albino.
C. One apple tree, in a very large orchard, produces its apples 2
weeks earlier than any of the other trees.
D. A 60-year-old smoker develops lung cancer.
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- You are a developmental geneticist studying flowering time variation in Arabidopsis. You perform a mutagenesis screen to identify mutants in the photoperiod pathway. You conduct the screen and find two different plants that show the same mutant phenotype. You then use a complementation test. What is the predicted outcome of this test if both phenotypes are caused by mutations in separate genes? recover the wild type phenotype overexpress the gene O recover the mutant phenotypeWhich of the following statements describes an example of a phenocopy? Explain your reasoning. a. Phenylketonuria results from a recessive mutation that causes light skin as well as intellectual disability. b. Human height is influenced by genes at many different loci. c. Dwarf plants and mottled leaves in tomatoes are caused by separate genes that are linked. d. Vestigial wings in Drosophila are produced by a recessive mutation. This trait is also produced by high temperature during development. e. Intelligence in humans is influenced by both genetic and environmental factors.Which of the following statements is true about the effects of mutations in somatic cells and gametes? A. Only mutations in gametes can affect future generations. B. Only mutations in somatic cells can affect future generations. C. Neither mutations in somatic cells or gametes can affect future generations. D. Mutations in both somatic cells and gametes can affect future generations.
- Which of the following is true regarding the presence of a multigene family? A. Multigene families are produced by any sort of chromosomal rearrangement. B. Multigene families are produced whenever a transposon is inserted into a gene. C. Multigene families are produced by all types of mutation, including single base substitutions. D. Multigene families are produced by some mutations that involve duplication.cyndi grows thousands of b.rapa plants from seed and carefully watches for any unusual plants that might be a new mutation. she has been watching a small seedling whose leaves continue to develop, but the stem is not elongating. The result is a cluster, or rosette of leaves sitting just above the soil surface. After 15 days the plant is beginning to produce flowers but is still a rosette Cyndi is encouraged and hypothesizes that rosette is a recessive mutation. describe the first cross she should make and the predicted result.Cyndi grows thousands of B. rapa plants from seed and carefully watches for any unusual plants that might be a new mutation. She has been watching a small seedling whose leaves continue to develop, but the stem is not elongating. The result is a cluster, or rosette, of leaves sitting just above the soil surface. After 15 days the plant is beginning to produce flowers but is still a rosette. Cyndi is encouraged and hypothesizes that rosetteis a recessive mutation. -Describe the first cross she should make and the predicted results. Because B. rapa is an annual plant, the one rosette individual dies. Cyndi would like to continue her study of this mutation, but all od the offspring from her original cross were normal. There are no more plants with the rosette mutation. -What can Cyndi do to continue her investigation of rosette? What would be the results of these "next steps"? -What results would you expect if Cyndi crosses her new generation of rosette plants with a known heterozygous…
- Which of the following BEST states genome editing in plants? A. transform large DNA constructs by suppression and activation B. insert a functional cis-regulatory element in the natural genes transgene vector C. assemble and synthesize large DNA molecules in a single transgene vector D. deletion, mutation, or integration of the gene of interest depending on the target traitcyndi grows thousands of b.rapa plants from seed and carefully watches for any unusual plants that might be a new mutation. she has been watching a small seedling whose leaves continue to develop, but the stem is not elongating. The result is a cluster, or rosette of leaves sitting just above the soil surface. After 15 days the plant is beginning to produce flowers but is still a rosette Cyndi is encouraged and hypothesizes that rosette is a recessive mutation. describe the first cross she should make and the predicted result. Because b.rapa is an annual plant, the one rosette individual dies.Cyndi would like to continue her study of this mutation, but all of her offspring from her original cross were normal. There are no more plants with the rosette mutation. What can cyndi do to continue her investigation of rosette? What would be the results of these "next steps" What results would you expect if Cyndi crosses her new generation of roseete plants with a known heterozygous plant…You are working with a strain of mutant flies that have no wings. You apply gamma rays to your strain of wingless files to induce further mutations and cross these flies. Remarkably, in your progeny a small proportion of the flies now have wild type wings. You conclude that the second round of mutations must have induced a new mutation called a?
- During the course of a research project you generate a gene knockout line in Arabidopsis thaliana to study the function of a gene you believe plays a crucial role in cellular metabolism. You note that the initial transformants are a bit smaller than normal. In subsequent crosses you are unable to isolate homozygotes for the knockout allele. Heterozygotes in subsequent generation are still a bit smaller than the homozygous wild type plants. Explain what is happening.At birth a child has got blue eyes, but now his/her eyes turn brown. Which of the following statements would best explain the observed phenomena? A. The child does not have brown pigment at birth B. Eye’s colour at birth is affected by mother’s gene C. Gene repressor for brown pigment produced is not yet active D. Gene activatior for brown pigment production is not yet active at birth E. All of the above statements are falseDefine the following terms: a. single nucleotide polymorphism b. nonsense mutation c. indel d. inversion e. translocation