In pedigree analysis, the symbol for affected male is

1. 

2. 

3. 

4. 

In the pedigree analysis, the meaning of the symbol  is 

1.  Still birth

2.  Dizygotic twin

3.  Mating between relatives

4.  Sex unspecified 

Pedigree analysis is not utilized to trace

(1) Specific trait

(2) Sex ratio

(3) Disease

(4) Abnormality

Study the pedigree chart given below to identify the disorder

(1) Sickle cell anaemia

(2) Haemophilia

(3) Myotonic dystrophy

(4) Phenylketonuria

What does the given pedigree chart shows? 

(1) Sex-linked recessive trait

(2) Sex-linked dominant trait

(3) Inheritance of Sickle cell anaemia

(4) Inheritance of autosomal dominant trait