Principles of Inheritance and Variation

Which of the following pairs is wrongly matched?

1. Starch synthesis in pea : Multiple alleles
2. ABO blood grouping : Co-dominance
3. XO type sex determination: Grasshopper
4. T.H. Morgan : Linkage

Which of the following characteristics represent 'Inheritance of blood groups' in humans?

1. B, C and E only
2. A, B and C only
3. B, D and E only
4. A, C and E only

A woman has an X-linked condition on one of her X chromosomes. This chromosome can be inherited by

1. only daughters
2. only sons
3. only grandchildren
4. both sons and daughters

Select the correct statement :

1. Franklin Stahl coined the term “linkage”.
2. Punnett square was developed by a British scientist.
3. Spliceosomes take part in translation.
4. Transduction was discovered by S. Altman.

Thalassemia and sickle cell anemia are caused due to a problem in globin molecule synthesis. Select the correct statement.

1. Both are due to a qualitative defect in globin chain synthesis
2. Thalassemia is due to less synthesis of globin molecules
3. Sickle cell anemia is due to a quantitative problem of globin molecules
4. Both are due to a quantitative defect in globin chain synthesis

The genotypes of a Husband and Wife are IAIB and IAi. Among the blood types of their children, how many different genotypes and phenotypes are possible?

1. 4 genotypes ; 3 phenotypes
2. 4 genotypes ; 4 phenotypes
3. 3 genotypes ; 4 phenotypes
4. 3 genotypes ; 3 phenotypes

A disease caused by an autosomal primary non-disjunction is :

1. Klinefelter's Syndrome
2. Down's Syndrome
3. Turner's Syndrome
4. Sickle Cell Anemia

Which one from those given below is the period for Mendel's hybridisation experiments ?

1. 1870 – 1877
2. 1857 – 1869
3. 1840 – 1850
4. 1856 – 1863

Among the following characters, which one was not considered by Mendel in his experiments on pea?

1. Stem-Tall or dwarf
2. Pod-Inflated or constricted
3. Trichomes-Glandular or non-glandular
4. Seed-Green or yellow

A cell at telophase stage is observed by a student in a plant brought from the field. He tells his teacher that this cell is not like other cells at telophase stage. There is no formation of cell plate and thus the cell is containing more number of chromosomes as compared to other dividing cells. This would result in -

1. Polyteny
2. Aneuploidy
3. Polyploidy
4. Somaclonal variation