Biology: Visual System Actions for ‘5. Visual System’ Subscribe Hide Description It’s easy to get swamped in details about the visual system. (This animation may help.) Discuss the visual pathways that originate in the retina and “ascend” to the visual cortex via the thalamus. In this week’s resources the retina […]

1. Phenylketonuria-Individuals with this disorder are unable to produce the enzyme responsible for the conversion of the amino acid phenylalanine to the amino acid tyrosine. Because tyrosine is needed in the production of melanin, PKU sufferers are very blond and fair -skinned. Phenylalanine is present in protein and in the […]

Topic: Food for Energy The kitchen may be the one room in which most people are most aware of the different systems and units of measurements used in the house and around the world. In the United States (U.S.), milk is bought by the gallon, sugar by the pound, soda […]

Question: Two dominant mutants in the first linkage group of the guinea pig govern the traits pollex (pX0, which is the ativistic return of thumb and little toe, and rough fur (P). When dihybrid pollex, rough pigs (with identical linkage relationships) were crossed to normal pigs, their progeny fell into 4 […]