Depiction of an early stage embryo. nobeastsofierce Science / Alamy Stock Photo In human embryos, testes in males and ovaries in females begin to develop at around four weeks, with sex determination ...
In mammals, sex differentiation relies on the establishment of chromosomal, or genetic, sex at fertilization, with subsequent differentiation of the gonad according to the genetic sex and ...
The Royal Society is a self-governing Fellowship of many of the world's most distinguished scientists drawn from all areas of science, engineering and medicine, and is the oldest scientific academy in ...
Early in human development, during the first trimester of gestation, a fetus may have XX or XY chromosomes that indicate its sex. Yet at this stage a mass of cells known as the bipotential gonad that ...
Early in fetal development, a mass of cells known as the bipotential gonad has the possibility of giving rise either to ovaries or testes, reproductive organs that contribute to many of the ...
In a new study published in Water Biology and Security, scientists from the Ocean University of China have constructed the first detailed cell map of the gonad in the hermaphroditic bay scallop ...
The genital gland of a sea urchin, the so-called gonad, is found inside the urchin. This organ stores nutrients, and contains milt and roe during the spawning season in spring. The gonads are very ...
Early in human development, during the first trimester of gestation, a fetus may have XX or XY chromosomes that indicate its sex. Yet at this stage a mass of cells known as the bipotential gonad that ...
Early in human development, during the first trimester of gestation, a fetus may have XX or XY chromosomes that indicate its sex. Yet at this stage a mass of cells known as the bipotential gonad that ...
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