... dad.¹

If it's a locus that's subject to genomic imprinting, it may be necessary to distinguish $A_1A_2$ from $A_2A_1$. Isn't genetics fun?

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... selection:²

If you're ambitious (or a little weird), you might want to try to see if you can derive this yourself.

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... see³

At least it's easy to see if you've stared a lot at these things in the past.

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... polymorphism⁴

A complete polymorphism is one in which all alleles are present.

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....⁵

Can you explain why? Take a close look at the fitnesses, and it should be fairly obvious.

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... diversity.⁶

The same thing can happen in ecological commmunities. Loss of a single species from a stable community may lead to a cascading loss of several more.

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... is:⁷

I didn't say it, but you can probably guess that I'm assuming that all of the conditions for Hardy-Weinberg apply, except for the assumption that all matings leave the same number of offspring, on average.

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... population.⁸

As an exercise you might want to see if you can derive the corresponding equations for $x_{12}'$ and $x_{22}'$.

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... equations.⁹

And you thought that dealing with one was bad enough!

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... fertilities.¹⁰

Fortunately, it takes rather weird fertility schemes to produce such a result.

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... trickery¹¹

The trickery isn't hard, just tedious. Justifying the trickery is a little more involved, but not too bad. If you're interested, drop by my office and I'll show you.

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... itself.¹²

A ``resident'' homozygote is the one of which the populations is almost entirely composed when all but one allele is rare.

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....¹³

There's a reason for doing this called Bateman's principle that we can discuss, if you'd like.

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