Simulations of sibling genomes show ancestry proportions vary only a few percentage points under typical recombination, so selecting among 10–20 embryos can tilt ancestry slightly but not change a child’s ethnic background. Only very recent admixture with long DNA tracts yields bigger swings, and consumer tests can misread tiny fractions due to measurement error.
— This undercuts sensational claims about 'designer ancestry' and helps regulators and ethicists focus on realistic risks and benefits of embryo selection.
2025.10.07
68% relevant
The article centers on embryo selection using polygenic scores (PGS), highlighting Herasight’s claims of strong within‑family prediction for disease and proposed IQ selection, while also stressing ancestry‑specific limits; this aligns with ongoing debates over what embryo selection can and cannot reliably optimize across populations.
Sebastian Jensen
2025.09.19
50% relevant
The article advances embryo selection for complex traits (IQ, disease risks) using polygenic scores and a new startup (Herasight); while not about ancestry selection, it operates in the same embryo‑selection space and underscores realistic trait targets versus sensational 'designer ancestry' claims.
Davide Piffer
2025.08.19
100% relevant
The article’s modeled 50/50 parents produce children with ~3.5% standard deviation in ancestry and a best-of-20 embryo max around mid‑50s%, while 98/2 parents show <1% variation and no path to 100% 'purity.'