No matter how it is born, a new gene starts its life as a single copy in the population.

As with any new mutation, by far the most likely outcome is that it will be lost by random drift or selection over the next few generations

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#Unit 11. Evolution and Behavior

Negative assortative mating

People only select mates who are phenotypically different from themselves for selective traits. 

Increases the frequency of heterozygous genotypes (Aa).

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#Unit 11. Evolution and Behavior

Neogene- Increasingly cool, dry climate; grasslands spread; modern families of mammals and birds; first apes

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#Unit 2. Cellular Organization

Sarcomere

Within each skeletal muscle cell are many myofibrils consisting of a repeating array of a specialized structure

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#Unit 4. Cell Communication and Cell Signaling

Gαi activate α2-Adrenergic receptor

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#Unit 13. Methods in Biology

Both the error type-i and type-ii are also known as “false negative”.