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Concept explainers
To explain: The sister chromatids do not end up in the same daughter cell, rather they are split apart equally into two daughter cells.
Introduction: During the S phase of cell cycle, the
To explain: The consequences if a mitotic error occurs where the sister chromatids end up in the same daughter cell.
Introduction: During the S phase of cell cycle, the DNA undergoes replication and two copies of DNA are produced, which are condensed to form sister chromatid structure bound to a centromere. The cell cycle process involves the cell division, M phase. The M phase has four stages: prophase, metaphase, anaphase, and telophase. In each of these phases, the chromosomes are aligned accordingly, so that each daughter cell receives only one copy of the chromosome each. In somatic cells, where mitosis takes place, the chromosomes are present in diploid number that is two copies of the same gene as alleles are present. The alleles can be homozygous or heterozygous.
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Chapter 18 Solutions
Essential Cell Biology (Fourth Edition)
- What is the opening indicated by the pointer? (leaf x.s.) stomate guard cell lenticel intercellular space none of thesearrow_forwardIdentify the indicated tissue? (stem x.s.) parenchyma collenchyma sclerenchyma ○ xylem ○ phloem none of thesearrow_forwardWhere did this structure originate from? (Salix branch root) epidermis cortex endodermis pericycle vascular cylinderarrow_forward
- Identify the indicated tissue. (Tilia stem x.s.) parenchyma collenchyma sclerenchyma xylem phloem none of thesearrow_forwardIdentify the indicated structure. (Cucurbita stem l.s.) pit lenticel stomate tendril none of thesearrow_forwardIdentify the specific cell? (Zebrina leaf peel) vessel element sieve element companion cell tracheid guard cell subsidiary cell none of thesearrow_forward
- What type of cells flank the opening on either side? (leaf x.s.) vessel elements sieve elements companion cells tracheids guard cells none of thesearrow_forwardWhat specific cell is indicated. (Cucurbita stem I.s.) vessel element sieve element O companion cell tracheid guard cell none of thesearrow_forwardWhat specific cell is indicated? (Aristolochia stem x.s.) vessel element sieve element ○ companion cell O O O O O tracheid O guard cell none of thesearrow_forward
- Identify the tissue. parenchyma collenchyma sclerenchyma ○ xylem O phloem O none of thesearrow_forwardPlease answer q3arrow_forwardRespond to the following in a minimum of 175 words: How might CRISPR-Cas 9 be used in research or, eventually, therapeutically in patients? What are some potential ethical issues associated with using this technology? Do the advantages of using this technology outweigh the disadvantages (or vice versa)? Explain your position.arrow_forward
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