Tay-Sachs disease is a fatal genetic disorder caused by a recessive allele.  The pedigree chart below shows the appears of the disease in three generations of a family.  Tell the genotype or possible genotypes of each member of the family.  Be sure to define your variables.

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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.