Talk:XY sex-determination system

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Wiki Education assignment: Developmental and Molecular Biology Spring 2024

This article was the subject of a Wiki Education Foundation-supported course assignment, between 8 January 2024 and 24 April 2024. Further details are available on the course page. Student editor(s): Dvassallo2020 (article contribs). Peer reviewers: Mhurt2020.

— Assignment last updated by Mhurt2020 (talk) 18:27, 21 February 2024 (UTC)[reply]

Strange wording "in the absence of the Y chromosome, the fetus will undergo female development"

In humans, the presence of the Y chromosome is responsible for triggering male development; in the absence of the Y chromosome, the fetus will undergo female development.

I am not an expert about this topic at all, but later in the article this seems contradicted..

In humans and many other species of animals, the father determines the sex of the child. In the XY sex-determination system, the female-provided ovum contributes an X chromosome and the male-provided sperm contributes either an X chromosome or a Y chromosome, resulting in female (XX) or male (XY) offspring, respectively.

To say "in the absence of the Y chromosome" sounds as if saying "that if a father contributes neither an X nor a Y chromosome the fetus will undergo female development". What actually seems to be the case is..

"In humans, the presence of the Y chromosome is responsible for triggering male development; the presence of a second X chromosome is responsible for triggering female development." Ybllaw (talk) 10:30, 11 May 2024 (UTC)[reply]

See Turner syndrome, absence of a second sex chromosome. —Tamfang (talk) 02:11, 12 May 2024 (UTC)[reply]

This sentence still sounds false to me, "in the absence of the Y chromosome, the fetus will undergo female development." is thus not true, as the Turner syndrome page talks about developmental impairment as a symptom of it. Ybllaw (talk) 09:59, 13 May 2024 (UTC)[reply]

Maybe thus something like..

"In humans, the presence of the Y chromosome is responsible for triggering male development; the presence of a second X chromosome is responsible for triggering female development. In the absence of a Y chromosome the sex will always be female." Ybllaw (talk) 10:02, 13 May 2024 (UTC)[reply]

I suggest someone who understands this topic better would actually write something, as what I've written here doesn't sound right either to me. Ybllaw (talk) 11:18, 13 May 2024 (UTC)[reply]