Given the following pedigree below, use Punnett squares for each of the following possibilities: a) X- linked recessive and b) X-linked dominant in order to determine what is the mode of transmission of this trait. Disease allele = XA or Xª, depending on mode of transmission of the disease respectively. Unaffected X chromosome = X *Unaffected/No carrier-Normal 11 d 1 * 1 1 2 a) X-linked recessive 9 III 2 genotype (circle one): XY 2 3 11x12 4 ΧΑΧΑ 2 3 5 Xaya *4 6 7 8 b) X-linked dominant 11x12 오 XAY Xay

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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.