Begegnungen mit der Natur 8, Arbeitsheft

Humangenetik 26 How about using English – Recessive or dominant? 1. Cystic fibrosis Schulbuch Seiten 52–57 O Tom, Gina’s father, has one allele for cystic fibrosis and one normal allele. Is he suffering from cystic fibrosis?  Yes. Explain why. ___________________________________________ _________________________________________________________  No. Explain why. ___________________________________________ _________________________________________________________ Sally, Gina’s mother, isn’t affected by the disease. Is it possible that Gina is affected?  Yes. Explain why. ___________________________________________ _________________________________________________________  No. Explain why. ___________________________________________ _________________________________________________________ Tom Sally Gina 3. Chorea Huntington Chorea Huntington is an inherited disorder which damages the nervous system. The symptoms appear at an age about 35 years: Chorea Huntington patients cannot control their muscles, their bodies jerk suddenly and gradually they cannot think clearly. Mostly, they die in middle age. George is affected by the Huntington’s disorder. a) Is the allele that causes Chorea Huntington dominant or recessive? _________________________________________ b) How likely is it that Sara is affected by Chorea Huntington? ___________________________________________________________________________________________________ 1. Complete the table Name affected by cystic fibrosis (yes/no) carrier (yes/no) alleles Jane CC Maria cc Robert Cc George Sandra Sara hH hh ? Nur zu Prüfzwecken – Eigentum des Verlags öbv