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In chapter 1 (https://github.com/ledelaney/biol002/blob/main/01-birth.Rmd#L19), we see
represents only five percent of the matter contained in the universe. We know the most about this kind of matter, because, well, we can see it, and touch it, and also we _are_ it. Yet nearly 85 percent of the matter in the universe

Should 85% be 95% or is the five percent in the previous line the part that is incorrect?

"how it works"

There is a small typo

In this experiment, as opposed to our dihyrbid cross experiment,

I fixed this in the following pull request #8

"an really"

The following statement is a little confusing:

First, all the DNA that makes up your entire genome exists within every single cell in your entire body.
That means there is A LOT of DNA in your body; I’ve read enough to stretch from here to the sun (93 million miles), and then to Pluto and back.

In particular, the part that says "I've read enough" could mean that you have read a lot of material in reference to the aforementioned fact. But I think what you are actually saying is that you have seen it in literature somewhere (the aforementioned fact) and are also saying that there is "enough" DNA to stretch from the Earth to the Sun, then to Pluto and then back.

"they slso have something"

"Maybe you substitute some different spices or flavors in your cake recipe. But you’ll probably always need to include things like flour or eggs. Cake recipes are not constrained i [JG: Missing "n"] the same way that DNA sequences are, but it may be a useful analogy. Or, maybe not."

Michael POLLAN. (heredity chapter)