EVIDENCE OF GENETIC VARIATION IN THE HUMAN SEX RATIO
It has been suggested that the probability of conceiving a male rather than a female varies from family to family. If this variation were connected with variations in the Y chromosome, then all males belonging to a family with a preponderance of males should have an excess of male children. In femal...
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| Veröffentlicht in: | Human biology 1967-05, Vol.39 (2), p.170-175 |
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| creator | TRICHOPOULOS, DIMITRI |
| description | It has been suggested that the probability of conceiving a male rather than a female varies from family to family. If this variation were connected with variations in the Y chromosome, then all males belonging to a family with a preponderance of males should have an excess of male children. In females no such relation could hold. The truth of this was tested on a sample of 1592 male and 697 female medical and dental students in Athens, whose family trees were known. There is indeed a statistically significant tendency for students to belong to sibships with a higher percentage of males when their father's subship also had a preponderance of males. Students whose father's sibship had a preponderance of females belonged to a sibship with a lower percentage of males. No similar relation was found when students sibships were classified by preponderance of males or females in their mother's sibship. |
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If this variation were connected with variations in the Y chromosome, then all males belonging to a family with a preponderance of males should have an excess of male children. In females no such relation could hold. The truth of this was tested on a sample of 1592 male and 697 female medical and dental students in Athens, whose family trees were known. There is indeed a statistically significant tendency for students to belong to sibships with a higher percentage of males when their father's subship also had a preponderance of males. Students whose father's sibship had a preponderance of females belonged to a sibship with a lower percentage of males. No similar relation was found when students sibships were classified by preponderance of males or females in their mother's sibship.</description><identifier>ISSN: 0018-7143</identifier><identifier>EISSN: 1534-6617</identifier><identifier>PMID: 6056273</identifier><language>eng</language><publisher>United States: Wayne State University Press</publisher><subject>Children ; Degrees of freedom ; Female ; Genetic variation ; Humans ; Male ; Pedigree ; Proportions ; Sex Chromosomes ; Sex Ratio</subject><ispartof>Human biology, 1967-05, Vol.39 (2), p.170-175</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/41448837$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/41448837$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>314,780,784,803,27869,58017,58250</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/6056273$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>TRICHOPOULOS, DIMITRI</creatorcontrib><title>EVIDENCE OF GENETIC VARIATION IN THE HUMAN SEX RATIO</title><title>Human biology</title><addtitle>Hum Biol</addtitle><description>It has been suggested that the probability of conceiving a male rather than a female varies from family to family. 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If this variation were connected with variations in the Y chromosome, then all males belonging to a family with a preponderance of males should have an excess of male children. In females no such relation could hold. The truth of this was tested on a sample of 1592 male and 697 female medical and dental students in Athens, whose family trees were known. There is indeed a statistically significant tendency for students to belong to sibships with a higher percentage of males when their father's subship also had a preponderance of males. Students whose father's sibship had a preponderance of females belonged to a sibship with a lower percentage of males. No similar relation was found when students sibships were classified by preponderance of males or females in their mother's sibship.</abstract><cop>United States</cop><pub>Wayne State University Press</pub><pmid>6056273</pmid><tpages>6</tpages></addata></record> |
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| ispartof | Human biology, 1967-05, Vol.39 (2), p.170-175 |
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| language | eng |
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| source | MEDLINE; Periodicals Index Online; Jstor Complete Legacy; Alma/SFX Local Collection |
| subjects | Children Degrees of freedom Female Genetic variation Humans Male Pedigree Proportions Sex Chromosomes Sex Ratio |
| title | EVIDENCE OF GENETIC VARIATION IN THE HUMAN SEX RATIO |
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