A journey towards answers: Bonnie Odgers Meets Dr. John Graham

Anna-Lisa Scott1, Bonnie Odgers1

  • 1University of California, Los Angeles, Carpinteria, California, USA.

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The homologous pairs of sister chromosomes—one from the maternal and one from the paternal genome—then begin to align alongside each other lengthwise, matching corresponding DNA positions in a process called synapsis.
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Crossing over01:34

Crossing over

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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