News tagged with sperm formation
Study reveals how changes in gene expression could lead to infertility
(PhysOrg.com) -- Researchers used a yeast model to map epigenetic processes-- those that influence gene expression -- in cells as they undergo sperm formation. Understanding the process can help explain how it goes awry in ...
Aug 23, 2010 |
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Pollination with precision: How flowers do it
Pollination could be a chaotic disaster. With hundreds of pollen grains growing long tubes to ovules to deliver their sperm to female gametes, how can a flower ensure that exactly two fertile sperm reach every ...
May 17, 2012 |
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Insect glands may illuminate human fertilization process
Insect glands are responsible for producing a host of secretions that allow bees to sting and ants to lay down trails to and from their nests. New research from Carnegie scientists focuses on secretions from glands in the ...
May 03, 2012 |
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How sperm and eggs develop precisely 23 chromosomes each
Researchers at the University of California, Davis have discovered a key tool that helps sperm and eggs develop exactly 23 chromosomes each. The work, which could lead to insights into fertility, spontaneous ...
Apr 12, 2012 |
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Egg Cetera #1: The immortal egg
In the first report of our Egg Cetera series on egg-related research, biologists Dr. Harry Leitch and Professor Azim Surani describe how advances in understanding egg development could transform reproductive ...
Apr 06, 2012 |
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Without second wave of brown fat, young mice can't live without mama
For all those who have wondered where they'd be without their mothers, a study reported in the February Cell Metabolism puts a whole new spin on the question. Mice whose mothers pass along a mutant copy of a single imprin ...
Feb 07, 2012 |
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Pairing up: How chromosomes find each other
After more than a century of study, mysteries still remain about the process of meiosis -- a special type of cell division that helps insure genetic diversity in sexually-reproducing organisms. Now, researchers ...
Nov 01, 2011 |
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Understanding the beginnings of embryonic stem cells helps predict the future
Ordinarily, embryonic stem cells exist only a day or two as they begin the formation of the embryo itself. Then they are gone.
Oct 13, 2011 |
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The machinery for recombination is part of the chromosome structure
During the development of gametes, such as egg and sperm cells in humans, chromosomes are broken and rearranged at many positions. Using state of the art technology, the research group of Franz Klein, professor for genetics ...
Aug 09, 2011 |
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How yeast chromosomes avoid the bad breaks
The human genome is peppered with repeated DNA elements that can vary from a few to thousands of consecutive copies of the same sequence. During meiosis—the cell division that produces sperm and eggs—repetitive ...
Aug 07, 2011 |
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Scientists discover that Hawai'i is not an evolutionary dead end for marine life
The question of why there are so many species in the sea and how new species form remains a central question in marine biology. Below the waterline, about 30% of Hawai'i's marine species are endemic – being found only ...
Jul 02, 2011 |
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List of search results for sperm formation
