Alternate Pathway That Leads To Palate Development Identified Aug 13, 2008
"For instance, we've learned that when someone has a haploid insufficiency and is missing one copy of the TGF-? gene, he or she is more vulnerable to environmental insults that can cause cleft palate, such as drugs, smoking and alcohol," Chai says. Smad4 is one of the main signaling molecules used in the TGF. (Science Daily)
Controlling Malaria Through Better Knowledge Of Genetics Of Plasmodium Populations Nov 9, 2007
With samples collected from humans, scientists can work only on the haploid phase of the parasite cycle during which only one example of each chromosome is present. Therefore they cannot measure the rate of association and organization between genes within populations. (Science Daily)
How Genes Fit Sep 7, 2007
And, although those genomes were referred to as complete, they were in fact "haploid" - that is, containing a parental mosaic of the DNA letters found on just one set of the 23 chromosomes paired in every cell. However, a recent and substantially more detailed sequencing of the human genome has now shattered that comfortable belief. (India Times, India)
More detailed DNA profile produced Sep 5, 2007
You'll have incredible information about yourself," said Stephen Scherer of the Hospital for Sick Children in Toronto, who was part of the multimillion-dollar project described in today's issue of the journal PLoS Biology. "I wouldn't be surprised if Internet-based browsers pop up before long that allow you to compare your genome to others (San Francisco Chronicle)
Manipulating Nature: Scientists Query Wildlife Birth-control Method Feb 13, 2007
Professor Cooper also raises concerns that individuals that survive the vaccine may be more likely to carry infectious diseases with the potential to affect other animals. An immuno-contraceptive vaccine causes an animal's immune system to produce antibodies that act against some essential event or structure in the reproductive process. (Science Daily)
Male insecurity is sensible (for insects) Jan 26, 2007
What Werren and his colleagues found was that some of the wasps with a half-supply -- or "haploid" -- set of chromosomes, were female, not male. Only one other case of "haploid" females was ever reported. (Seacoast New Hampshire)
Young Single Men Are More Likely To Bank Sperm Before Testicular Cancer Treatment Jan 10, 2007
A quarter of men with testicular cancer banked their sperm before treatment, but only six per cent of those actually used the sperm to father a child, according to a study published in the January issue of the urology journal BJU International. Researchers from the Vanderbilt University Medical Centre in Nashville, USA, surveyed 129 males treated at the institution over a ten-year period. (Science Daily)
Scientists Discover Role For Dueling RNAs Nov 18, 2006
Why don't haploids make sense. Haploid cells, which contain one copy of each chromosome, should not undergo further reduction of their chromosome number (through a type of cell division called meiosis) ... To prevent such a catastrophic event, haploids block the production of a protein called IME4 by expressing antisense IME4. (Science Daily)
Sperm Proteome Gives 'Tantalizing Glimpse' Towards The Origin Of Sex Nov 14, 2006
The first ever catalogue of the different types of proteins found in sperm could help reveal the origins of sex and explain some of the mysteries of infertility, say scientists. Drosophila sperm inside egg. (Science Daily)
ABCB6 Is Key To Production Of Heme In Hemoglobin Sep 29, 2006
Investigators at St. Jude Children's Research Hospital have discovered that a protein called ABCB6 plays a central role in production of a molecule that is key to the ability of red blood cells to carry oxygen, of liver cells to break down toxins, and of cells to extract energy from nutrients. The St. Jude investigators showed that ABCB6 is lodged within the outer membrane of the cell's energy powerhouse called the mitochondria; and that it ferries into mitochondria a type of molecule called a... (Science Daily)
What Controls Stickiness Of 'Smart' Chromosomal Glue May 10, 2006
Only in a second stage of meiosis that gives rise to haploid sperm or egg cells do centromeric cohesins become cleaved ... Only after this exchange, or recombination, do the cells proceed to the second stage of meiosis -- dividing without chromosome replication to produce haploid sperm or egg cells ... spermatozoa), and more commonly known as a sperm cell, is the haploid cell that is the male gamete. (Science Daily)
Sperm-producing Stem Cells Found In Testicles Could Be Extracted, Grown In The Lab, And Frozen For Future Use Apr 26, 2006
spermatozoa), and more commonly known as a sperm cell, is the haploid cell that is the male gamete. It joins an ovum to form a zygote. (Science Daily)
Insects That Produce Males From Unfertilized Eggs Reveal A Surprising Cellular Feat Apr 19, 2006
Because the males of these insects develop from unfertilized eggs, they have half the number of chromosomes that females have--in technical terms, the males are haploid and the females are diploid. This situation, known as haplodiploidy, results in interesting genetic relationships that are thought to underlie the complex social behavior of Hymenopteran insects. (Science Daily)
Nearly Half Of Ashkenazi Jews Descended From Four 'Founding Mothers' Jan 18, 2006
The Y-chromosome and mitochondria DNA are haploid, containing DNA transmitted from only one parent. Thus, the Y-chromosome provides information about paternal ancestry while mtDNA provides information about maternal ancestry. (Science Daily)
