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Dec. 2, 2021 —Researchers offer a phylogenetic and ontogenetic overview of the primitive streak and its role in mediating amniote (vertebrate animals that develop on land) gastrulation, and discuss the ...
Sep. 9, 2022 —科学家们已经知道性别确定rtebrates happens in the germ cells, a body's reproductive cells, and the somatic cells, the cells that are not reproductive cells. Yet they ...
June 23, 2023 —Warmer temperatures are known to make more turtle eggs become female hatchlings, but new research shows that those females also have a higher capacity for egg production, even before their sex is ...
May 25, 2023 —The many types of cells in the human body are produced through the process of differentiation, in which stem cells are converted to more specialized types. Currently, it is challenging for ...
May 23, 2022 —Researchers have found that a carefully orchestrated act of X-chromosome 'yoyo' predicts the successful and efficient development of mammalian egg cells. The findings could pave the way for ...
Sep. 7, 2021 —For species that rely on sexual reproduction, including mice and men, offspring can only happen if sperm from the male fertilize eggs from the female. Even artificial fertilization techniques depend ...
Mar. 9, 2023 —Most cells in the bodies of living things duplicate their contents and physically separate into new cells through the process of cell division. But across many species, germ cells, those that become ...
Nov. 29, 2021 —Researchers have observed a male bias in protein expression in primordial germ cells, which develop into the cells that pass on genetic material during reproduction, of the fruit fly, Drosophila. ...
May 13, 2022 —The microbes that help break down food actually tell the gut how to do its job better, according to a new study in mice. The researchers said it appears that the microbes are able to influence which ...
Dec. 6, 2022 —For the first cell to develop into an entire organism, genes, RNA molecules and proteins have to work together in a complex way. At first, this process is indirectly controlled by the mother. At a ...