Failure of cytokinesis after telophase stage of cell divislon results in an increase in a whole set of chromosomes in an organism and, this phenomenon is known as:

1. Aneuploidy

2. Translocation

3. Polyploidy.

4. Inversion

Which of the following is not a feature of Down's Syndrome?

1. It is caused by a non-disjunction in an autosome

2. The affected individual has trisomy of chromosome 21

3. The aflected individual has a characteristic simian palmar crease

4. The mental development of affected individual is normal

Aneuploidy results from :

1. Point mutations

2. Gross structural changes in chromosomes

3. Failure of cytokinesis after telophase stage of cell division

4. Failure of segregation of chromatids during cell division 

Which of the following would not be a feature seen in a patient with the following karyotype ?

1. Many loops on finger tips

2. Congenital heart disease

3. Big and wrinkled tongue

4. Mucus clogging of airways

A disease caused by an autosomal primary non-disjunction is 

(1) Down's syndrone

(2) Kilnerfelter's syndrome

(3) Turner's syndrome

(4) Sickle-cell anemia