CBSE - Class 12 Biology Principles of Inheritance and Variation Worksheet
1.
Explain the following terms with example (a) Co-dominance
2.
Differentiate between the following – (a) Dominance and Recessive
3.
Differentiate between the following – (b) Homozygous and Heterozygous
4.
Differentiate between the following – (c) Monohybrid and Dihybrid.
5.
Define and design a test-cross.
6.
Using a Punnett Square, workout the distribution of phenotypic features in the first filial generation after a cross between a homozygous female and a heterozygous male for a single locus.
7.
Mention the advantages of selecting pea plant for experiment by Mendel.
8.
Two heterozygous parents are crossed. If the two loci are linked what would be the distribution of phenotypic features in \(F_{1}\) generation for a dibybrid cross?
9.
Explain the following terms with example (b) Incomplete dominance
10.
What is point mutation? Give one example.
11.
When a cross in made between tall plant with yellow seeds (\(TtYy\)) and tall plant with green seed (\(Ttyy\)), what proportions of phenotype in the offspring could be expected to be (b) dwarf and green.
12.
Who had proposed the chromosomal theory of the inheritance?
13.
When a cross in made between tall plant with yellow seeds (\(TtYy\)) and tall plant with green seed (\(Ttyy\)), what proportions of phenotype in the offspring could be expected to be (a) tall and green.
14.
Mention any two autosomal genetic disorders with their symptoms.
15.
Explain the Law of Dominance using a monohybrid cross.
16.
What is pedigree analysis? Suggest how such an analysis, can be useful.
17.
A diploid organism is heterozygous for 4 loci, how many types of gametes can be produced?
18.
How is sex determined in human beings?
19.
Briefly mention the contribution of T.H. Morgan in genetics.
20.
A child has blood group O. If the father has blood group A and mother blood group B, work out the genotypes of the parents and the possible genotypes of the other offsprings.
