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Related Concept Videos

Crossing Over01:30

Crossing Over

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, duplicated...
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.
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.
In order to...
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.
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.
In order to...
Crossover Experiments01:16

Crossover Experiments

Crossover experiments, also called the repeated-measurements design, is a study design in which all experimental units are exposed to all treatments in different periods. Crossover experiments are generally used in psychology, the pharmaceutical industry, agriculture, and medicine.
Crossover designs are performed even with smaller sample sizes since the samples can act as their controls. These are better than simple randomized trials since patients are exposed to all the treatments.
Gene Conversion02:08

Gene Conversion

Other than maintaining genome stability via DNA repair, homologous recombination plays an important role in diversifying the genome. In fact, the recombination of sequences forms the molecular basis of genomic evolution. Random and non-random permutations of genomic sequences create a library of new amalgamated sequences. These newly formed genomes can determine the fitness and survival of cells. In bacteria, homologous and non-homologous types of recombination lead to the evolution of new...
Gene Conversion02:08

Gene Conversion

Other than maintaining genome stability via DNA repair, homologous recombination plays an important role in diversifying the genome. In fact, the recombination of sequences forms the molecular basis of genomic evolution. Random and non-random permutations of genomic sequences create a library of new amalgamated sequences. These newly formed genomes can determine the fitness and survival of cells. In bacteria, homologous and non-homologous types of recombination lead to the evolution of new...

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Related Experiment Video

Updated: Jun 6, 2026

Frequency and Distribution of Crossovers in Caenorhabditis elegans Meiosis by SNP Genotyping using Real-time PCR
06:18

Frequency and Distribution of Crossovers in Caenorhabditis elegans Meiosis by SNP Genotyping using Real-time PCR

Published on: July 11, 2025

Crossing over to the other side.

Michael J Mackay1

  • 1Emergency Department, Gympie Hospital, Gympie, QLD, Australia. mmackay@matilda.net.au

The Medical Journal of Australia
|December 15, 2010
PubMed
Summary
This summary is machine-generated.

A physician experienced the emergency department from a patient's perspective, highlighting critical care gaps and the emotional toll of sudden illness. This unique viewpoint offers insights into improving patient care and physician well-being during medical emergencies.

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Last Updated: Jun 6, 2026

Frequency and Distribution of Crossovers in Caenorhabditis elegans Meiosis by SNP Genotyping using Real-time PCR
06:18

Frequency and Distribution of Crossovers in Caenorhabditis elegans Meiosis by SNP Genotyping using Real-time PCR

Published on: July 11, 2025

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Using a Virtual Reality Walking Simulator to Investigate Pedestrian Behavior

Published on: June 9, 2020

Area of Science:

  • Medical Education
  • Emergency Medicine
  • Patient Experience

Background:

  • Physicians typically provide care in emergency departments (EDs).
  • Sudden critical illness can rapidly shift a physician's role to that of a patient.
  • Understanding this transition is crucial for improving care delivery.

Purpose of the Study:

  • To explore the experience of an emergency department physician becoming a patient in Resuscitation Bay 2.
  • To identify potential system and emotional challenges during this role reversal.
  • To gain insights into enhancing the patient experience in critical care settings.

Main Methods:

  • A first-person narrative account of a physician's experience as a critically ill patient in their own ED.
  • Qualitative reflection on the events, emotions, and observations during the resuscitation.
  • Analysis of the transition from caregiver to care recipient.

Main Results:

  • The physician experienced profound vulnerability and loss of control.
  • Communication breakdowns and system inefficiencies were perceived more acutely.
  • The emotional impact of being a patient in a familiar yet suddenly alien environment was significant.
  • The need for compassionate, patient-centered communication was underscored.

Conclusions:

  • Physician-patient role reversal in the ED offers unique insights into care quality.
  • Empathy and clear communication are paramount, even for medical professionals.
  • Systemic improvements are needed to support both patients and providers during critical events.