Myotonic dystrophy is

1. Autosomal recessive trait

2. Autosomal dominant trait

3. X- linkeddominant trait

4. X- linked recessive trait

Which of the following is least probable? 

1. Female child with Sickle cell anaemia

2. Male child with haemophilia

3. Carrier female for haemophilia

4. Female child with haemophilia

Which of the following genotypes could cause Sickle cell anaemia? 

1. Hbˢ + Hbᴬ

2. Hbᴬ+ Hbᴬ

3. Hbˢ + Hbˢ

4. Both ‘A’ and ‘C’.

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

Which of the following statements are correct?

(i) Polyploidy is caused due to failure of cytokinesis after telophase.

(ii) polyploidy results into increase in number of autosomes

(iii) Turner’s syndrome is an example of polyploidy

(iv) polyploidy results into an increase in a whole set of chromosomes

1. (i) and (ii)

2. (i) and (iii)

3. (ii) and (iii)

4. (i) and (iv)

Sex determination in Honey bee depends upon-

1. Number of sets of chromosomes present in parents

2. Number of sets of chromosomes present in progenies

3. Number of sets of genes present in parents

4. Number of sets of genes present in progenies

What is wrong with respect to sex determination in honey bee?

1. Unfertilized egg develops as a male by means of parthenogenesis.

2. Union of sperm and egg develops as a female

3. All workers and males will have 16 chromosomes while queen will have 32 chromosomes.

4. Males produce sperms by mitosis.

What is the special characteristic feature of haplodiploid sex determination?

1. Males produce sperms by mitosis

2. Number of sets of chromosomes present in progenies will decide their sex

3. Workers will have diploid set of chromosomes.

4. Drones will have haploid set of chromosome.

If the offspring is aa, what possible combination of parental genotype would have produced these progenies?

1. AA and aa

2. Aa and AA

3. aa and AA

4. Aa and Aa