A recessive allele (a) that causes a genetic disease has a frequency (q) of 0.01. If the population mates randomly (F = 0), the frequency of individuals affected by the disease (aa) will be q = 0.01 = 0.0001.

However, if F = 0.25 expected frequency of the aa is .0026.

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#Unit 5. Developmental Biology

Reciprocal induction occurs when the two interacting tissues are both inducers and are competent to respond to each other’s signals.

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#Unit 6. System Physiology – Plant

C4 leaf has two distinct chloroplast-containing cell types: mesophyll and bundle sheath (or Kranz, German for “wreath”) cells

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#Unit 4. Cell Communication and Cell Signaling

Chronic myelogenous leukemia, 

a common leukemia in humans, associated with the Philadelphia chromosome

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#Unit 4. Cell Communication and Cell Signaling

CAMs fall into one of four major families: 

Cadherins

Immunoglobulin (Ig) superfamily

Integrins

Selectins

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#Unit 3. Fundamental Processes

The E. coli oriC contains 11 copies of the sequence GATC/CTAG which is a target for methylation at the N6 position of adenine by the Dam methylase enzyme.