Genetics and Evolution

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

Principles of Inheritance and Variation

Subtopic

Principles of Inheritance and Variation under Genetics and Evolution for Grade 12 ICSE.

Preview questions (no answers)

1.
$The physical and observable expression of a genetic trait in an organism is called its:$
A. $Phenotype$
B. $Genotype$
C. $Allele$
D. $Haplotype$
2.
$Which of the following chromosome combinations results in a human male offspring?$
A. $XX$
B. $XO$
C. $XY$
D. $ZW$
3.
$F_{2}$
A. $3:1$
B. $1:2:1$
C. $9:3:3:1$
D. $1:1$

Download the worksheet for Genetics and Evolution - Principles of Inheritance and Variation to practice offline. It includes additional chapter-level practice questions.

Molecular Basis of Inheritance

Subtopic

Molecular Basis of Inheritance under Genetics and Evolution for Grade 12 ICSE.

About Topic & Revision

Preview questions (no answers)

1.
$Which enzyme is primarily responsible for unwinding the DNA double helix during the process of replication?$
A. $DNA Polymerase$
B. $DNA Ligase$
C. $Topoisomerase$
D. $Helicase$
2.
$The 'beads-on-a-string' structure seen under an electron microscope during the packaging of DNA in eukaryotes represents:$
A. $Genes$
B. $Chromatids$
C. $Nucleosomes$
D. $Centromeres$
3.
$Which of the following nitrogenous bases is unique to RNA and replaces Thymine found in DNA?$
A. $Cytosine$
B. $Guanine$
C. $Adenine$
D. $Uracil$

Download the worksheet for Genetics and Evolution - Molecular Basis of Inheritance to practice offline. It includes additional chapter-level practice questions.

Evolution

Subtopic

Evolution under Genetics and Evolution for Grade 12 ICSE.

About Topic & Revision

Preview questions (no answers)

1.
$The concept of 'Survival of the Fittest' as a mechanism for evolution was proposed by:$
A. $Jean-Baptiste Lamarck$
B. $Hugo de Vries$
C. $Charles Darwin$
D. $Gregor Mendel$
2.
$The wings of a butterfly and the wings of a bird represent which type of evolutionary structures?$
A. $Homologous organs$
B. $Analogous organs$
C. $Vestigial organs$
D. $Rudimentary organs$
3.
$In the Miller-Urey experiment, which of the following gases was NOT included in the spark discharge flask to simulate the primitive atmosphere?$
A. $CH_4$
B. $NH_3$
C. $H_2$
D. $O_2$

Download the worksheet for Genetics and Evolution - Evolution to practice offline. It includes additional chapter-level practice questions.

Genetics and Evolution

Principles of Inheritance and Variation

❓Preview questions (no answers)

Molecular Basis of Inheritance

❓Preview questions (no answers)

Evolution

❓Preview questions (no answers)

Preview questions (no answers)

Preview questions (no answers)

Preview questions (no answers)