Concept explainers
To sketch: The chromosomal alignment at metaphase I for a cell having AaBb genotype that will give rise to two Ab and two aB gametes.
Introduction: Meiosis is a reductional division in which a single cell divides to form four haploid cells, each genetically distinct from the parent cell. The germ cells undergo meiosis to form gametes or sex cells, namely, sperm cells and egg cells. Gametes are haploid cells; that is, they contain only one set of chromosomes.
To determine: The probability of occurrence of the above alignment of chromosomes in the gametes.
Introduction: Meiosis and mitosis are involved in the reproduction of multicellular organisms. The two processes involve nuclear division and cytokinesis. In both divisions, a diploid cell forms new daughter cells.
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PRINCIPLES OF LIFE - LAUNCHPAD (1 TERM)
- 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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