G-6-P dehydrogenase deficiency is associated with haemolysis of -

A women with 47 chromosomes due to three copies of chromosome 21 is characterized by

A man and a woman, who do not show any apparent signs of a certain inherited disease, have seven children (2 daughter and 5 sons). Three of the sons suffer from the given disease but none of the daughters are affected. Which of the following mode of inheritance do you suggest for this disease

In order to find out the different types of gametes produced by a pea plants having the genotype AaBb, it should be crossed to a plant with the genotype -