Sperm chromosome analysis of two men heterozygous for reciprocal translocations: t(1;9)(q22;q31) and t(16;19)(q11.1;q13.3)
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Bibliographic record
Abstract
Sperm chromosome complements were analysed in two men who were heterozygous carriers of reciprocal translocations. A total of 363 sperm were karyotyped after in vitro penetration of hamster oocytes, including 180 sperm from a male with a t(1;9)(q22;q31) and 183 from a male with a t(16;19)(q11.1;q13.3). All possible 2:2 and 3:1 meiotic segregations were observed for both translocations. The frequencies of alternate, adjacent 1, adjacent 2, and 3:1 segregations were 46%, 38%, 13%, and 4% for the t(1;9) and 40%, 28%, 31%, and 1% for the t(16;19), respectively. Within the alternate segregation group, the number of normal sperm was not significantly different from the number of sperm carrying a balanced form of the translocation for either of the translocations, as expected. There was no evidence for an interchromosomal effect of either translocation, since the frequencies of numerical abnormalities unrelated to the translocation were within the normal range observed in sperm from control donors. The percentage of sperm with an unbalanced form of the translocation was 54% for the t(1;9) and 61% for the t(16;19).
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Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
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Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
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