albinism is a genetic You arrive at home just before dinner and the smell of a c

Question

albinism is a genetic You arrive at home just before dinner and the smell of a chocolate cake baking in the oven fills the air. As the cake is baking, the chocolate odor diminishes and is replaced by the smell of tomato sauce simmering on the stove. Provide an explanation for this scenario. The results in the table below were obtained from an examination to test the effects of olfaction on gustation. Explain what the result mean. Effects of olfaction on Gustation. One minus(-) sign means that the food item could not be tested. One plus (+) sign means that the food item could be tested. Multiple plus (++) signs mean that the taste was enhanced. Describe three ways that the accessory eye structures protect the eye. Albinism is a genetic condition characterized by the lack of melanin production. a. Identify the eye structures that this condition will affect. b. Will vision be affected? Explain.

Explanation / Answer

Albinism is a rare group of genetic disorders that cause the skin, hair, or eyes to have little or no color. The defective gene passes down from both parents to the child and causes albinism.

Ocular albinism type 1 is inherited in an X-linked pattern. A condition is considered X-linked if the mutated gene that causes the disorder is located on the X chromosome, one of the two sex chromosomes. In males (who have only one X chromosome and one Y), one altered copy of the causative gene in each cell is sufficient to cause the characteristic features of ocular albinism, because males do not have another X chromosome with a working copy of the gene. Because females have two copies of the X chromosome, women with only one copy of a mutation in each cell usually do not experience vision loss or other significant eye abnormalities.

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