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| Content Provider | Springer Nature Link |
|---|---|
| Author | Golubovsky, M. D. |
| Copyright Year | 2011 |
| Abstract | We describe a previously unnoticed reproductive deviation in the large families of the Romanov dynasty of Russian tsars. Consecutive births of four to five baby girls were observed in a series of generations, usually after the birth of the first girl, regardless of the birth order. This oddity, called “Female tetrad” or F-tetrad, was manifested in large families and was independent of the preceding sex order. In families with more than five children, the following distributions of sex and birth order were observed: FFFFF, FFFFM, MFFFF, MFFFFFMMM, MMFFFFFMMF, and MMFFFFFFMM. The predisposition to the repetitive births of girls depended on the direct influence of the paternal genotype. This trait was transmitted through both paternal and maternal lines. The putative F-tetrad factor(s) has a dominant effect, as well as incomplete penetrance and expressivity. In terms of physiological genetics, this anomaly can be described in the following manner: the first birth of a baby girl in marriages where the father carried the F-tetrad factor significantly increased the probability of the subsequent birth of three to four girls. After giving birth to the first girl, the mother acquired some kind of “reproductive memory,” which altered the normal sex ratio in the next three to five births. Possible genetic causes capable of inducing such an F-tetrad oddity are discussed. |
| Starting Page | 283 |
| Ending Page | 289 |
| Page Count | 7 |
| File Format | |
| ISSN | 20790597 |
| Journal | Russian Journal of Genetics: Applied Research |
| Volume Number | 1 |
| Issue Number | 4 |
| e-ISSN | 20790600 |
| Language | English |
| Publisher | SP MAIK Nauka/Interperiodica |
| Publisher Date | 2011-08-21 |
| Publisher Place | Dordrecht |
| Access Restriction | Subscribed |
| Subject Keyword | genetics reproduction sex ratio paternal effect Human Genetics |
| Content Type | Text |
| Resource Type | Article |
| Subject | Genetics Animal Science and Zoology Agronomy and Crop Science |
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