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tag sexual reproduction genetics genomics neuroscience

X and Y Chromosomes Concern More Than Reproduction
Karen Young Kreeger | Feb 3, 2002 | 6 min read
Editor's Note: This is the third article in a series on sex-based differences in the biology of males and females. Future articles in the series will cover sex-based differences in autoimmunity, drug metabolism, and life expectancy. While responses to "What's the difference between men and women?" might evoke answers about reproductive plumbing and hormones, researchers are unearthing some subtle, genomic reasons for the differences. So far, the linchpins to finding these genomic variations seem
a microscope image of a rotifer
Bacterial Enzyme Keeps Rotifers’ Transposable Elements in Check
Christie Wilcox, PhD | Mar 3, 2022 | 5 min read
Jumping genes in bdelloid rotifers are tamped down by DNA methylation performed by an enzyme pilfered from bacteria roughly 60 million years ago, a study finds.
The Genetics of Society
Claire Asher and Seirian Sumner | Jan 1, 2015 | 10 min read
Researchers aim to unravel the molecular mechanisms by which a single genotype gives rise to diverse castes in eusocial organisms.
Ghosts in the Genome
Oliver J. Rando | Dec 1, 2015 | 10+ min read
How one generation’s experience can affect the next
Epigenetics: Genome, Meet Your Environment
Leslie Pray | Jul 4, 2004 | 10+ min read
©Mehau Kulyk/Photo Researchers, IncToward the end of World War II, a German-imposed food embargo in western Holland – a densely populated area already suffering from scarce food supplies, ruined agricultural lands, and the onset of an unusually harsh winter – led to the death by starvation of some 30,000 people. Detailed birth records collected during that so-called Dutch Hunger Winter have provided scientists with useful data for analyzing the long-term health effects of prenat
Sex Differences in the Brain
Margaret M. McCarthy | Oct 1, 2015 | 10+ min read
How male and female brains diverge is a hotly debated topic, but the study of model organisms points to differences that cannot be ignored.
Southbound genes
Amber Dance | Apr 7, 2009 | 3 min read
A genome study in monarch butterflies pulls out a set of 40 key players in long distance migration
The Rodent Wars: Is a Rat Just a Big Mouse?
Ricki Lewis | Jul 4, 1999 | 5 min read
Sometimes it seems as if genome projects are cropping up everywhere.1 But until costs come down, limited resources are being largely concentrated into what Joseph Nadeau, professor of genetics at Case Western Reserve University School of Medicine, calls "the genome seven," an apples-and-oranges list of viruses, bacteria, fungi, Arabidopsis thaliana, Drosophila melanogaster, Caenorhabditis elegans, and mouse, with Homo sapiens in its own category.2 Researchers widely acknowledge that in the rod
2020 Top 10 Innovations
The Scientist | Dec 1, 2020 | 10+ min read
From a rapid molecular test for COVID-19 to tools that can characterize the antibodies produced in the plasma of patients recovering from the disease, this year’s winners reflect the research community’s shared focus in a challenging year.
The Promise that Haplotypes Hold
Leslie Pray | Nov 25, 2001 | 6 min read
Sifting through the 3 billion letters of DNA that comprise the human genome to find disease-associated sequences is at best a daunting task. But recent evidence suggests that this genome is organized into highly structured blocks called haplotypes, highly conserved packages that contain SNPs (single nucleotide polymorphisms) and exhibit very little genotypic variation. Enlisting these haplotypes in the search may make this undertaking easier than previously thought. Evidence of such organizati

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