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Unit 7 Review Questions

Unit 7 Review Questions. Determine the chromosome numbers if the diploid number of the organism is 50: Number of chromosomes in haploid cells: Number of chromatids in a haploid cell during metaphase: Number of chromatids during metaphase I, meiosis:

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Unit 7 Review Questions

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  1. Unit 7 Review Questions

  2. Determine the chromosome numbers if the diploid number of the organism is 50: • Number of chromosomes in haploid cells: • Number of chromatids in a haploid cell during metaphase: • Number of chromatids during metaphase I, meiosis: • Number of chromosomes at the end of metaphase II • List three processes that can result in genetic variety • Describe the structure of DNA

  3. Describe the structure of chromosomes: • Compare and contrast mitosis in plants and animals • Give 5 differences between mitosis and meiosis • Why does the cell cycle need to be regulated? • Describe the process of regulating the cell cycle by cyclins and cdk’s • Differentiate between DNA replication on the leading and lagging strand. • Describe how the Hershey and Chase experiment contributed to the discovery of DNA.

  4. Haplopappus is an annual flowering plant that grows in deserts. It has a 2n number of only four. • This means that the cells in the vegetative parts of the plant that are not undergoing mitosis have how many DNA molecules? • During metaphase of mitosis, how many DNA molecules would be in the nucleus? • What phase of the cell cycle are most body cells in? • List and describe the external environmental factors that influence the cell cycle.

  5. A horticulturalist breeds orchids, trying to obtain a plant with a unique combination of desirable traits. After many years she finally succeeds. To produce more plants like this one, should she cross-breed it with another plant or clone it? Why? • Each sperm cell of a pea plant contains seven chromosomes. What are the haploid and diploid numbers of this plant?

  6. Identify the stage and type of cell division you see on the picture. • Determine the haploid and diploid number of this cell. • Label the chromosomes (duplicated or not duplicated ?), centromere, nonsister chromatids, homologous chromosomes, chiasmata, sister chromatids, spindle fibers, centrioles

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