The pedigree shows inheritance of the autosomal recessive trait cystic fibrosis in a family. Family members who are known to have the disease are represented by black shading. I 1 2 3 4 II 4 6 8. II 1 2 3 4 5 6 7 Part A: Select the best answer from the boxes below to indicate the likely genotypes of the following individuals, where F indicates the wild-type (usual) allele and f indicates the cystic fibrosis allele. The first part of their number (I, Il or III) indicates their generation or row, whilst the second part of their number (1-8) indicates the individual within that generation or row. |-4 II-3 Il-8 III-3

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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.