A team of bio-scientists affiliated with a host of institutions across the U.S. has developed a gene editing technique to produce newborn pigs immune to porcine reproductive and respiratory syndrome, also known as blue-ear ...
Researchers at Tel Aviv University have developed a hybrid micro-robot, the size of a single biological cell (about 10 microns across), that can be controlled and navigated using two different mechanisms—electric and magnetic. ...
Bio & Medicine
Mar 27, 2023
0
408
Scientists from Denmark and China have estimated germline mutation rates across vertebrates by sequencing and comparing genetic samples from 151 mother, father, and offspring trios from 68 species of mammals, fishes, birds ...
In a discovery that challenges over a century of evolutionary conventional wisdom, corals have been shown to pass somatic mutations—changes to the DNA sequence that occur in non-reproductive cells—to their offspring. ...
Evolution
Aug 31, 2022
0
302
Infertility affects one in seven men of reproductive age worldwide. One idea for treating male sterility is spermatogonial stem cell (SSC) therapy. In this approach, sperm stem cells in the testis are transferred to a test ...
Molecular & Computational biology
Jul 13, 2020
3
266
Maturing sperm cells turn on most of their genes, not to follow their genetic instructions like normal, but instead to repair DNA before passing it to the next generation, a new study finds.
Cell & Microbiology
Jan 23, 2020
0
454
Princeton University researchers have discovered that learned behaviors can be inherited for multiple generations in C. elegans, transmitted from parent to progeny via eggs and sperm cells. The paper detailing this finding, ...
Cell & Microbiology
Jun 6, 2019
0
518
Female fruit flies can feel when a sexual partner is a good fit. Scientists have long known that proteins in a male fly's ejaculate make female flies temporarily lose interest in other partners. It's a trick male flies use ...
Plants & Animals
May 6, 2019
0
114
Waves of undulating cilia drive several processes essential to life. They clear debris and mucus from the respiratory tract, move spinal fluid through the brain and transport embryos from the ovaries to the uterus for implantation. ...
Cell & Microbiology
Jan 14, 2019
0
69
Plant biologists at the University of California, Davis have discovered a way to make crop plants replicate through seeds as clones. The discovery, long sought by plant breeders and geneticists, could make it easier to propagate ...
Biotechnology
Dec 12, 2018
2
139
A sperm, from the ancient Greek word σπέρμα (seed) and ζῷον (living being) 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. A zygote is a single cell, with a complete set of chromosomes, that normally develops into an embryo.
Sperm cells contribute half of the genetic information to the diploid offspring. In mammals, the sex of the offspring is determined by the sperm cell: a spermatozoon bearing a Y chromosome will lead to a male (XY) offspring, while one bearing an X chromosome will lead to a female (XX) offspring (the ovum always provides an X chromosome). Sperm cells were first observed by Anton van Leeuwenhoek in 1677.
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