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Jane suffers from a genetic disease. Two of her three sons and one out of her three daughters also have the disease. Three of her seven grandsons and two of her three granddaughters have the disease. Which of the following modes of inheritance is the most likely mode of inheritance for the disease in this family?

The karyotype is the number of chromosomes in the nucleus of a eukaryotic cell. Which of the following human karyotypes is an example of trisomy?

Meiosis and mitosis are two types of cell division. Which of the following statements about meiosis is true?

Sex linked inheritance of genetic defects can be described as X-linked recessive or X-linked dominant. Which of the following statements concerning sex linked dominant disorders is true?

Which among the following is an example of an oncogene?

A couple are referred for genetic counselling. Both parents are carriers of a faulty gene PEX1; possession of two abnormal copies of this gene leads to death in infancy. They have lost two children who both died in the first 2 years of life. They have one healthy daughter, who is 3 years of age. What is the risk that their daughter is a carrier?