Luisa is a carrier of the allele for Tay-Sachs but has no sign of any eye disorder in her family. She married Gerard whose mother was afflicted with retinitis pigmentosa, unlike his father. Neither of his parents has any history of Tay-Sachs disease. 1. What are the genotypes of Luisa and Gerard?  2. If they plan to have five children, what is the probability that: a. all their children will be normal? b. they will have a daughter with retinitis pigmentosa?  c. they will have a son inflicted with both conditions?  d. at least 2 will be normal? (show COMPLETE solutions for this question)

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Inheritance and Mendelian Genetics

Inheritance means the passing of traits to offspring from parents. These traits could be passed either through asexual reproduction or sexual reproduction. The offspring receives the genetic material from the parents. Mendelian inheritance is a certain biological inheritance that follows the rules and principles laid down by Gregor Mendel in 1865. The initial hypothesis was considered wrong, but other inheritance theories modified the concept of inheritance and thus genetics.