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Several Punnett squares illustrating these interactions are noted on the next page. Note that females are likely to be color blind 33 percent of the time while males are likely to be color blind 50 percent of the time in these interactions. This is also illustrated on the following page.

All possible sex-linked trait crosses except color blindness
(The list of test crosses ONLY FOR color blindness follows.)
1. ...
2. ...
3. ...
4. ...

In the book, there is only one chart. Although the title of this single chart says there are all crosses EXCEPT those for color blindness, there are actually crosses ONLY FOR color blindness.
The word except means not including, but, besides. Doesn't it mean then that all possible sex-linked trait crosses are included other than test crosses for color blindness? Is it just a mistake in the book or some other meaning of the word in the context?

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  • Elena, would you please quote the complete sentence in the beginning? "All possible sex-linked trait crosses except color blindness"
    – Sina
    Aug 31, 2017 at 8:51
  • @Sina, actually it is a complete title before the list of test crosses, but I can include a few previous sentences as well
    – user59519
    Aug 31, 2017 at 8:59
  • You could also say other than or excluding or except for. Or you could put the color-blindness table first and then put "Other sex-linked trait crosses" as the label for the second table.
    – TimR
    Aug 31, 2017 at 9:53
  • @Tᴚoɯɐuo wait; so you mean it is a mistake there? (I'm not sure if I wrote the citation in the right way; in the book, there is only one chart. Although the title of this single chart says there are all crosses EXCEPT those for color blindness, there are actually crosses ONLY FOR color blindness.)
    – user59519
    Aug 31, 2017 at 11:11
  • Ah, I thought "The list of test crosses ONLY FOR color blindness follows" meant follows below, that is, after the list of crosses that excluded color blindness. except color blindness means "not including color blindness".
    – TimR
    Aug 31, 2017 at 12:00

1 Answer 1

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I don't see any interpretation of the bold sentence matching the context in this you have quoted it.

'all possible' implies that this is a table which either applies to everything XX+XY->XX/XY which has a different expression to colour blindness, or it's tabulating the traits which are not similar to colour blindness.

'except' does mean that the table is not about colour blindness, and it is about other things.

This means that either you are wrong about your interpretation of what the table shows, or the text is wrong. You can confirm by cross checking against other texts.

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