CBSE - Class 12 Biology Principles of Inheritance and Variation Worksheet
1.
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.
2.
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?
3.
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.
4.
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.
5.
Differentiate between the following – (c) Monohybrid and Dihybrid.
6.
Explain the following terms with example (a) Co-dominance
7.
What is pedigree analysis? Suggest how such an analysis, can be useful.
8.
Differentiate between the following – (b) Homozygous and Heterozygous
9.
How is sex determined in human beings?
10.
Differentiate between the following – (a) Dominance and Recessive
11.
Mention the advantages of selecting pea plant for experiment by Mendel.
12.
Mention any two autosomal genetic disorders with their symptoms.
13.
What is point mutation? Give one example.
14.
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.
15.
Define and design a test-cross.
16.
Who had proposed the chromosomal theory of the inheritance?
17.
Explain the Law of Dominance using a monohybrid cross.
18.
Explain the following terms with example (b) Incomplete dominance
19.
A diploid organism is heterozygous for 4 loci, how many types of gametes can be produced?
20.
Briefly mention the contribution of T.H. Morgan in genetics.
