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Related Concept Videos

Meiosis II01:57

Meiosis II

Meiosis II is the second and final stage of meiosis. It relies on the haploid cells produced during meiosis I, each of which contain only 23 chromosomes—one from each homologous initial pair. Importantly, each chromosome in these cells is composed of two joined copies, and when these cells enter meiosis II, the goal is to separate such sister chromatids using the same microtubule-based network employed in other division processes. The result of meiosis II is two haploid cells, each containing...
Background and Environment Affect Phenotype02:27

Background and Environment Affect Phenotype

Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
Responses to Heat and Cold Stress02:45

Responses to Heat and Cold Stress

Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
Oogenesis02:07

Oogenesis

In human women, oogenesis produces one mature egg cell or ovum for every precursor cell that enters meiosis. This process differs in two unique ways from the equivalent procedure of spermatogenesis in males. First, meiotic divisions during oogenesis are asymmetric, meaning that a large oocyte (containing most of the cytoplasm) and minor polar body are produced as a result of meiosis I, and again following meiosis II. Since only oocytes will go on to form embryos if fertilized, this unequal...

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Related Experiment Video

Updated: May 21, 2026

Chick ex ovo Culture and ex ovo CAM Assay: How it Really Works
17:23

Chick ex ovo Culture and ex ovo CAM Assay: How it Really Works

Published on: November 30, 2009

Eggs come in from the cold.

Roger G Gosden1, Lucinda L Veeck Gosden

  • 1Weill Cornell Medical College, New York, NY, USA. Roger.Gosden@cantab.net

Trends in Endocrinology and Metabolism: TEM
|June 30, 2012
PubMed
Summary
This summary is machine-generated.

Oocyte cryopreservation using vitrification technology allows eggs to be stored indefinitely. This breakthrough in assisted reproductive technology offers new possibilities for fertility treatment and preservation.

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Related Experiment Videos

Last Updated: May 21, 2026

Chick ex ovo Culture and ex ovo CAM Assay: How it Really Works
17:23

Chick ex ovo Culture and ex ovo CAM Assay: How it Really Works

Published on: November 30, 2009

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08:49

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Published on: August 22, 2019

Windowing Chicken Eggs for Developmental Studies
15:01

Windowing Chicken Eggs for Developmental Studies

Published on: October 1, 2007

Area of Science:

  • Reproductive Science
  • Biotechnology

Background:

  • Assisted reproductive technologies (ART) aim to overcome infertility.
  • Cryopreservation of human oocytes has been a significant challenge.

Purpose of the Study:

  • To report the successful cryopreservation of oocytes using vitrification.
  • To highlight the implications of this advancement in reproductive medicine.

Main Methods:

  • Oocyte cryopreservation utilizing vitrification technology.

Main Results:

  • Successful long-term storage of oocytes is now achievable.
  • Vitrification offers a viable method for oocyte cryopreservation.

Conclusions:

  • The successful cryopreservation of oocytes marks a major advancement in ART.
  • This technology has profound implications for infertility treatment, fertility preservation, and reproductive choices.