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Class 10 Practice - Level 1 - Heredity and Evolution
Total questions: 40
1.
Which of the following is a unit of heredity?
Topic:
Heredity
Gene
Protein
Carbohydrate
Lipid
None
2.
Who is known as the father of genetics?
Topic:
Heredity
Charles Darwin
Gregor Mendel
Jean-Baptiste Lamarck
Alfred Wallace
None
3.
What does the phenotype of an organism represent?
Topic:
Heredity
The genetic makeup of an organism
The physical expression of traits
The habitat of an organism
The diet of an organism
None
4.
Which scientist proposed the theory of evolution by natural selection?
Topic:
Evolution
Isaac Newton
Albert Einstein
Charles Darwin
Louis Pasteur
None
5.
Which of the following represents a homozygous genotype?
Topic:
Heredity
Aa
BB
Ab
Bb
None
6.
What is the primary mechanism of evolution according to Darwin?
Topic:
Evolution
Artificial selection
Natural selection
Genetic drift
Mutation
None
7.
Which of the following is an example of a recessive trait in humans?
Topic:
Heredity
Brown eyes
Black hair
Blue eyes
Dark skin
None
8.
The preserved remains or traces of organisms from the past are called:
Topic:
Evolution
Fossils
Minerals
Rocks
Bones
None
9.
In Mendel's experiments, which trait appeared in the F1 generation of a monohybrid cross?
Topic:
Heredity
Dominant trait
Recessive trait
Both traits equally
Neither trait
None
10.
Which era is known as the "Age of Reptiles"?
Topic:
Evolution
Paleozoic
Mesozoic
Cenozoic
Precambrian
None
11.
In humans, the sex of a child is determined by:
Topic:
Heredity
The mother's chromosomes
The father's chromosomes
Both parents' chromosomes equally
Environmental factors
None
12.
What is the term for a trait that increases an organism's ability to survive and reproduce?
Topic:
Evolution
Mutation
Adaptation
Variation
Evolution
None
13.
What do we call the different forms of a gene?
Topic:
Heredity
Alleles
Chromatids
Loci
Gametes
None
14.
Which of the following is a vestigial structure in humans?
Topic:
Evolution
Heart
Lungs
Appendix
Brain
None
15.
What is the shape of the DNA molecule?
Topic:
Heredity
Linear
Circular
Double helix
Triple helix
None
16.
Which of the following is an example of homologous structures?
Topic:
Evolution
Wings of bats and birds
Wings of butterflies and birds
Fins of fish and flippers of whales
Leaves of different plants
None
17.
In a dihybrid cross, what is the typical phenotypic ratio observed in the F2 generation?
Topic:
Heredity
3:1
1:2:1
9:3:3:1
1:1:1:1
None
18.
Which of the following best describes speciation?
Topic:
Evolution
The extinction of a species
The evolution of a new species
The migration of a species
The mutation of genes
None
19.
What is the role of mRNA in protein synthesis?
Topic:
Heredity
It carries the genetic code from DNA to ribosomes
It forms the structure of ribosomes
It transfers amino acids to the ribosome
It catalyzes the formation of peptide bonds
None
20.
Which term describes the process by which humans breed plants and animals for specific traits?
Topic:
Evolution
Natural selection
Genetic drift
Artificial selection
Gene flow
None
21.
Which of the following pairs of alleles represents a heterozygous genotype?
Topic:
Heredity
AA
Aa
aB
BB
None
22.
Which concept explains the similarity of bone structures in the forelimbs of whales, bats, and humans?
Topic:
Evolution
Convergent evolution
Divergent evolution
Parallel evolution
Coevolution
None
23.
In humans, how many pairs of chromosomes are present?
Topic:
Heredity
22
23
24
46
None
24.
Which of the following is an example of a transitional fossil?
Topic:
Evolution
Tyrannosaurus rex
Archaeopteryx
Homo sapiens
Canis lupus
None
25.
What is a karyotype?
Topic:
Heredity
The genetic makeup of an organism
A chart of all the chromosomes in a cell
A type of genetic mutation
The physical expression of a trait
None
26.
The idea that geological processes have shaped Earth gradually over long periods is known as:
Topic:
Evolution
Catastrophism
Uniformitarianism
Punctuated equilibrium
Gradualism
None
27.
Which of the following diseases is caused by a recessive allele?
Topic:
Heredity
Huntington's disease
Cystic fibrosis
Marfan syndrome
Achondroplasia
None
28.
Which term describes the slow and steady accumulation of small genetic changes in a population?
Topic:
Evolution
Genetic drift
Gene flow
Gradualism
Punctuated equilibrium
None
29.
Which of the following is NOT a nucleotide found in DNA?
Topic:
Heredity
Adenine
Guanine
Uracil
Thymine
None
30.
Which of the following processes can introduce new genetic variation into a population?
Topic:
Evolution
Genetic drift
Mutation
Natural selection
Gene flow
None
31.
In a test cross, an organism with a dominant phenotype but unknown genotype is crossed with:
Topic:
Heredity
A homozygous dominant organism
A homozygous recessive organism
A heterozygous organism
An organism with an unknown genotype
None
32.
The similarity in the wing structures of bats and the flippers of dolphins is an example of:
Topic:
Evolution
Homologous structures
Analogous structures
Vestigial structures
Transitional structures
None
33.
Which of the following best describes an autosomal dominant disorder?
Topic:
Heredity
Only males are affected
Both males and females can be affected, and only one copy of the defective gene is needed to express the disorder
Both males and females can be affected, but two copies of the defective gene are needed to express the disorder
Only females are affected
None
34.
Which of the following is a common method used to determine the age of fossils?
Topic:
Evolution
Radiometric dating
Genetic sequencing
Comparative anatomy
Behavioural studies
None
35.
What does a Punnett square help predict?
Topic:
Heredity
The physical traits of an organism
The probability of an offspring inheriting particular alleles
The environmental adaptations of a species
The fossil record of a species
None
36.
Which type of selection favours intermediate phenotypes and reduces variation?
Topic:
Evolution
Disruptive selection
Stabilizing selection
Directional selection
Balancing selection
None
37.
Which of the following is a sex-linked disorder?
Topic:
Heredity
Down syndrome
Haemophilia
Cystic fibrosis
Huntington's disease
None
38.
Which of the following best explains genetic drift?
Topic:
Evolution
The movement of genes between populations
Random changes in allele frequencies within a population
The development of new species
The adaptation of organisms to their environment
None
39.
Which process ensures the correct distribution of chromosomes to daughter cells during cell division?
Topic:
Heredity
Meiosis
Mutation
Mitosis
Translation
None
40.
Which of the following concepts is illustrated by the finches of the Galápagos Islands, as observed by Darwin?
Topic:
Evolution
Genetic drift
Adaptive radiation
Convergent evolution
Coevolution
None
1 out of 40
Time's up
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