Hemidesmosomes are integrin-containing anchoring junctions that attach cells to elements of the underlying extracellular matrix.

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Nonrandom Mating Affects the Genotypic Frequencies of a Population.

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Nonrandom Mating - Nonrandom mating are two type,

1. Positive assortative mating - Like individuals to mate.

2. Negative assortative mating - Unlike individuals to mate

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Positive assortative mating refers to a tendency for like individuals to mate. For example, humans exhibit positive assortative mating for height.

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Inbreeding

Preferential mating between related individuals.

Inbreeding is more likely to take place in nature when population size becomes very small, and the number of mates is limited.