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One of the following is most suitable for study of mutations: |
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- Which of the following best describes the concept of independent assortment? Group of answer choices a. 2n, where n = number of chromosomes b. Gametes receive one of each chromosome pair but which chromosome it receives is decided randomly c. Refers to the Mendelian genetics d. Independent assortment always occurs at prophase 2 in eukaryotic organisms. e. Is the process of specified segregation and assortment of chromosomes in an organism.When n equals ABC, AAAABBBBCCCC is: a. trisomic b. tetraploid c. tetrasomic d. triploidWhich of the following types of chromosomal changes would youexpect to have phenotypic consequences? Explain your choices.A. Pericentric inversionB. Reciprocal translocationC. DeletionD. Unbalanced translocation
- a. How would you synthesize a pentaploid?b. How would you synthesize a triploid of genotypeA/a/a?c. You have just obtained a rare recessive mutation a*in a diploid plant, which Mendelian analysis tells you isA/a*. From this plant, how would you synthesize atetraploid (4n) of genotype A/A/a*/a*?d. How would you synthesize a tetraploid of genotypeA/a/a/a?A species of a plant has 2n = 16 chromosomes. How many chromosomes will be found per cell in each of the following mutants in this species? a. Monosomic: d. Trisomic: b. Autotriploid: e. Nullisomic: c. Autotetraploid: f. Tetrasomic:Compare the following three terms: polyploidy, aneuploidy, and nondisjunction. Briefly discuss examples of each of these conditions.
- Species I has 2 n = 16 chromosomes. How many chromosomes will be found per cell in each of the following mutants in this species? a. Monosomic b. Autotriploid c. Autotetraploid d. Trisomic e. Double monosomic f. Nullisomic g. Autopentaploid h. TetrasomicAltered chromosome structure can drastically affect an individual organism’s phenotype. However, some types of chromosomal rearrangements are more likely to be harmful than others. Categorize the following types of rearrangements from MOST LIKELY to be harmful to LEAST LIKELY to be harmful. A. reciprocal translocation, deletion, translocation B. deletion, translocation, inversion C. inversion, translocation, reciprocal translocation D. translocation, inversion, duplicationThe physical cause of the law of independent assortment for genes on the same chromosome is which of the following? Group of answer choices A. crossing over B. separation of homologous chromosomes in mitosis C.separation of sister chromatids in mitosis D. separation of sister chromatids in meiosis E. separation of homologous chromosomes in meiosis
- In a karyotype of a man whose wife has had several miscarriages, it was discovered that he had onlv 45 chromosomes. However, he displayed no obvious phenotypic defects. Furthermore, one of the chromosomes of pair 15 was abnormally long. Which of the following terms best describes the condition of this man? a. monosomy b,. trisomy c. tetrasomy d. translocation carrier e. edward syndormeSpecies I has 2n = 16 chromosomes. How many chromosomes will be found per cell in each of the following mutants in this species? a. Monosomic b. Autotriploid c. Autotetraploid d. Trisomic e. Double monosomic f. Nullisomic g. h. Tetrasomic AutopentaploidDuring a practical, a group of biology students are tasked to study the cell cycle of an insect. This insect has the karyotype 2n=6, with genotype Aa Bb Ee HH. The students must draw a G2 cell about to enter meiosis, using red lines for maternal chromosomes, blue lines for paternal chromosomes and black dots to represent centromeres. The drawing provided by the students is shown below. a) Identify three mistakes the students made when producing this diagram. In your answer only refer to elements already present in the figure. (3) b) This fly is used in a testcross. What is the probability of producing a fly with genotype Aa bb ee Hh?
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