Broad palm with single palm crease is visible in a person suffering from-

Which one of the following symbols represents mating between relatives in human pedigree analysis?

Given below are two statements:

Statement I : Sickle cell anaemia and haemophilia are autosomal dominant traits.

Statement II : Sickle cell anaemia and haemophilia are disorders of the blood.

In the light of the above statements, choose the correct answer from the options given below :

In meiosis, crossing over and exchange of genetic material between homologous chromosomes are catalyzed by the enzyme