There are special breeds of chicken, where there is a gene on a sex chromosome, whose effect is visible in the chick. Now, with CRISPR and genetic engineering,

There are special breeds of chicken, where there is a gene on a sex chromosome, whose effect is visible in the chick. Now, with CRISPR and genetic engineering, it may become possible one day to sex them at the egg stage by expressing a simple gene. A tiny biopsy, similar to in ovo vaccination, would reveal the sex. But the consumers don't like genetic engineering...