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Crossing over is the exchange of genetic information between homologous chromosomes during prophase I of meiosis I. Genetic recombination gives rise to allelic diversity in the newly formed daughter cells. In humans, crossing over produces genetically distinct haploid egg and sperm cells that undergo fertilization to produce unique offspring. Before cell division starts, the germ cell’s chromosome(s) undergo duplication in the S phase of the cell cycle. As the cells enter prophase I,...
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Unlike mitosis, meiosis aims for genetic diversity in its creation of haploid gametes. Dividing germ cells first begin this process in prophase I, where each chromosome—replicated in S phase—is now composed of two sister chromatids (identical copies) joined centrally.
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The double-stranded structure of DNA has two major advantages. First, it serves as a safe repository of genetic information where one strand serves as the back-up in case the other strand is damaged. Second, the double-helical structure can be wrapped around proteins called histones to form nucleosomes, which can then be tightly wound to form chromosomes. This way, DNA chains up to 2 inches long can be contained within microscopic structures in a cell. A double-stranded break not only damages...
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How I broke through.

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    Area of Science:

    • Nursing and Healthcare Management

    Background:

    • Wellington Makala began his career at North East London NHS Foundation Trust (NELFT) in 2001.
    • He progressed from a nursing student to a qualified mental health nurse within the trust.

    Purpose of the Study:

    • This abstract highlights the career progression of a healthcare professional within a National Health Service (NHS) foundation trust.
    • It showcases the journey from a student role to a senior operational leadership position.

    Main Methods:

    • Longitudinal career tracking within a single NHS trust.
    • Observation of professional development and role advancement.

    Main Results:

    • Demonstrates a sustained career path within NELFT.
    • Highlights advancement to deputy director of operations for mental health services.

    Conclusions:

    • Successful career trajectory within the NHS.
    • Indicates opportunities for growth and leadership within mental health services at NELFT.