Articles tagged with Meiosis
Researchers discovered that a pathogenic yeast species can complete a full sexual cycle despite lacking key reproductive genes. This phenomenon may play a role in the evolution of drug resistance and provides insights into chromosomal abnormalities.
A study published in Science reveals that the Dazl protein plays a crucial role in initiating meiosis in response to retinoic acid signals. The researchers found that mice lacking the Dazl protein failed to express Stra8, a marker of meiotic initiation, whereas those with the protein clearly expressed Stra8 and entered meiosis.
Researchers have identified two proteins controlling the pause in meiotic division, with Matrimony preventing Polo kinase from working until sufficient levels are reached. This work may lead to new treatments for infertility and cancer, as Polo kinase is strongly expressed in tumor cells.
Researchers have found that double-strand DNA breaks occur more frequently in specific regions near telomeres and centromeres, increasing the likelihood of chromosome gene swapping. This discovery may lead to a better understanding of developmental chromosome abnormalities and birth defects.
A team of scientists has discovered the crucial role of phosphorylation and recombination in the step-wise loss of cohesins during meiosis. This process is essential for accurate chromosome segregation into separate cells. The findings provide significant insights into the intricate mechanisms governing cohesin function.
A team led by Dr Josephine Bowles and Professor Peter Koopman discovered that retinoic acid, a derivative of Vitamin A, triggers the beginning of meiosis in female embryos, resulting in egg production. In males, an enzyme suppresses meiosis until after birth, leading to sperm production.
Researchers at Cornell University found that higher-than-normal progesterone levels in female chickens during the first meiosis significantly produce more females. The study suggests that female birds manipulate sex ratios to adapt to their environment and ensure the next generation has enough females to care for.
Researchers found evidence of meiosis in Giardia intestinalis, a unicellular protist parasite, suggesting that eukaryotes have been capable of sex for a long time. The discovery provides insight into the evolution of sexual reproduction in eukaryotic cells.
Researchers found evidence for meiosis in Giardia, a single-celled protist thought to be a modern representative of an early diverging eukaryotic lineage. The discovery suggests that the earliest eukaryotes diverged after the advent of meiosis, providing new insights into sexual evolution.
Scientists have made a groundbreaking discovery about DNA crossover during meiosis, which is crucial for sexual reproduction. The new findings suggest that the decision to make a crossover or non-crossover recombination is made much earlier than previously thought, shedding light on the molecular basis of this process.
A new study on Neurospora crassa reveals a gene silencing mechanism called MSUD, which could have implications for human reproduction and speciation. The process involves the scanning of paired chromosomes before they separate, and can eliminate deleterious genes in organisms.