Question

Shorten this into 2 sentences
New X‑chromosome data support the idea that mutations causing male lethality are X‑linked. About half of F1 females show the predicted deficit of male offspring, consistent with those females being heterozygous (one normal X and one mutant X), while surviving males inherit only the normal maternal X. Classic experiments by Muller—inducing mutations on the male X with radiation and following them through crosses—further demonstrated that the X can acquire and transmit such mutations. The authors note the conclusion could change if future, unexpected data reveal additional mutations or patterns.

Answer 1

New X‑chromosome data support that male‑lethal mutations are X‑linked: about half of F1 females show the predicted deficit of male offspring (consistent with heterozygotes carrying one mutant and one normal X), while surviving males inherit only the normal maternal X. Classic Muller experiments—inducing mutations on the male X with radiation and following them through crosses—also showed the X can acquire and transmit such mutations, though the authors caution the conclusion could change if future data reveal additional mutations or patterns.