相关实验视频

Updated: May 27, 2025

Techniques for Imaging Prometaphase and Metaphase of Meiosis I in Fixed Drosophila Oocytes
09:11

Techniques for Imaging Prometaphase and Metaphase of Meiosis I in Fixed Drosophila Oocytes

Published on: October 31, 2016

9.0K

在D.中冷诱导的介质性不分裂. 黑色巨 (Melanogaster) 是一种

Lewis I Held1, Surya J Banerjee1, Souvik Roy1

  • 1Dept. of Biological Sciences, Texas Tech University, Lubbock, Texas, United States.

microPublication biology
|February 19, 2025
PubMed
概括

在雌性果 (D. melanogaster) 中,低温会在半衰期中破坏螺旋功能. 这项研究揭示了 meiois 的存在.

更多相关视频

Novel Assay for Cold Nociception in Drosophila Larvae06:52

Novel Assay for Cold Nociception in Drosophila Larvae

Published on: April 3, 2017

7.7K
Isolation of Drosophila melanogaster Testes03:13

Isolation of Drosophila melanogaster Testes

Published on: May 13, 2011

32.3K

相关概念视频

Meiosis II02:02

Meiosis II

Meiosis II entails cell division and segregation of the sister chromatids, resulting in the production of four unique haploid gametes. The steps for meiosis II are similar to mitosis, except that meiosis II occurs in haploid cells, whereas mitosis occurs in diploid cells.
The timing and cell division patterns of meiosis differ between males and females. In male meiosis, the centrosomes are part of the formation of the meiotic spindle. However, in oocytes, including that of humans, Drosophila,...
42.6K
Nondisjunction01:29

Nondisjunction

During meiosis, chromosomes occasionally separate improperly. This occurs due to failure of homologous chromosome separation during meiosis I or failed sister chromatid separation during meiosis II. In some species, notably plants, nondisjunction can result in an organism with an entire additional set of chromosomes, which is called polyploidy. In humans, nondisjunction can occur during male or female gametogenesis and the resulting gametes possess one too many or one too few chromosomes.
74.4K
Meiosis vs. Mitosis02:57

Meiosis vs. Mitosis

Cell division is necessary for growth and reproduction in organisms. Mitosis aids cell growth and development by dividing somatic cells. In contrast, meiosis causes the division of germ cells and plays an essential role in sexual reproduction. Due to their unique functional requirements, mitosis and meiosis differ from each other in multiple aspects.
Before the start of mitosis and meiosis I, the cell synthesizes DNA, resulting in two homologous copies of each chromosome. DNA synthesis is...
52.3K
Meiosis I03:09

Meiosis I

Meiosis is the division of a diploid cell into haploid cells forming sperm and eggs in animals through differentiation. Meiosis I is the first stage of meiosis, where the genetic recombination of homologous chromosomes and the reduction of the ploidy level by half occurs.
Prophase I is the most extended and complex step of meiosis I characterized by synapsis, chromosome pairing, and recombination of the homologous chromosomes. This process is facilitated by a proteinaceous structure called the...
37.5K
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...
6.4K