The most puzzling aspect of this is the 78% spider result from spider X spider breedings. It suggests that the Homozygous spiders are there--you would expect, 50% spider, 25% homo spider, and 25% normal, right? You get 78% spider, and you figure 1/3 of those must surely be homozygous. But, they didn't prove to be homozygous in breedings.
How are what should be homozygous spiders winding up with a normal gene???
It's almost as though there's no pair there--just either the spider gene is present, or the normal gene is present, but there's no second gene to make a pair. Is that possible?
Reply With Quote