Which of the following is not a hereditary disease?

1. Haemophilia. 

2. Cretinism. 

3. Cystic fibrosis. 

4. Thalassemia.

A person with Down syndrome will show all the given
symptoms except

1. Many loops on finger tips.
2. Flat back of head
3. Big and wrinkled tongue
4. Narrow round face

Two phenotypically normal individuals have an affected child. What can we conclude about the parents?

1. they both carried the diesease allele

2. they are not the parents of the child

3. they are affected

4. no conclusions can be drawn

In a marriage between a male with blood group A and a female with blood group B, the progeny had either blood group AB or B. What could be the possible genotype of the parents?

1. I^A i (Male) ; I^B I^B (Female)

2. I^A I^A (Male) ; I^B I^B (Female)

3. I^A I^A (Male) ; I^B i (Female)

4. I^A i (Male) ; I^B i(Female)

Match the items of Column - I with Column - II :

Select the correct option from the following:

A normal woman, whose father had colour blindness, married a normal man. What is the chance of occurrence of colour blindness in the progeny?

1. 25%

2. 50%

3. 100%

4. 74%

Cystic fibrosis, Myotonic dystrophy and Thalassemia are

1. Chromosomal disorders

2. Autosomal recessive disorders

3. Mendelian disorders

4. Autosomal dominant disorders

All are the characteristics of an individual from trisomy
of chromosome 21, except

1. Short stature

2. Gynaecomastia

3. Palm crease

4. Furrowed tongue

An individual with AaBb genotype is producing four types of gametes as AB, aB, Ab and ab by meiosis. If the frequency of these gametes is 25% each then, it explains

1.  Incomplete linkage

2.  Mutations

3.  Independent assortment 

4.  Complete linkage 

Which one of the following Mendelian trait controlling unit is expressed in homozygous condition only?

1.  Axial flower

2.  Yellow seed

3.  Yellow pod

4.  Smooth seed