Punnett Square Activity: Directions: You find out that having a thumb that can bend back (e.g. hitchhikers thumb) is a recessive trait in humans. Your female friend Anna, who has a hitchhikers thumb, is about to have a baby with a male partner, Jose, who does not have a hitchhikers thumb, although one of his parents does have hitchhikers thumb. Anna wants to know how likely it will be that her children will have a hitchhikers thumb. Use capital ‘H’ to represent the dominate allele and lower case 'h' to represent the recessive allele. 1. What are the genotypes of Anna and Jose? a. Anna b. Jose Hitchhiker's thumb No hitchhiker's thumb 2. Fill out the Punnett square below using Anna and Jose's genotypes: Anna's Genotype Jose's Genotype

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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.