Typically, female mouse embryos with two X chromosomes develop ovaries because a gene called Sox9 is suppressed. In male ...

One extra letter of DNA. That was all it took to override an entire chromosome’s worth of instructions and turn a female ...

Scientists discovered that making a very small change to female mice's DNA caused them to develop male reproductive organs.

It’s challenging to sustain a pregnancy when food is short, or conditions are otherwise tough. That’s why many mammalian embryos can postpone their growth to get through periods of environmental ...

Scientists at the University of California, Santa Cruz (UCSC), used CRISPR to engineer cellular models of embryos that mimic what happens in the first few days after reproductive cells meet. These ...

A single DNA letter, inserted into a stretch of the genome that doesn’t code for any protein, was enough to turn genetically ...

Prefer Newsweek on Google to see more of our trusted coverage when you search. Scientists have created a 6-legged mouse embryo with an extra pair of hindlimbs at the expense of their external ...

Magdalena (Magda) Zernicka-Goetz, today a developmental and stem cell biologist at the University of Cambridge and California Institute of Technology, recalled being an artistic child who enjoyed ...