NTSE SAT Biology - Heredity and Evolution
Exam Duration: 45 Mins Total Questions : 30
During meiosis, crossing over (gene exchange between chromosomes) may occur, crossing over usually results in
- (a)
Fertilization and developement
- (b)
The formation of identical offspring
- (c)
Variation within the species
- (d)
Over production of gametes
When the effects of both alleles are equally expressed in the heterozygote which one of the following occurs?
- (a)
Segregation
- (b)
Codominance
- (c)
Pleiotropy
- (d)
Incomplete dominance
The assumption that life comes only from pre-existing life is called
- (a)
Biogenesis
- (b)
Neogenesis
- (c)
Organogenesis
- (d)
Oogenesis
Which principle was given by Darwin?
- (a)
Inheritance of acquired character
- (b)
Germplasm theory
- (c)
Mutation theory
- (d)
Theory of natural selection
Evidenceofevolutionary relationships is found in ____
- (a)
Atmosphere
- (b)
Fossils
- (c)
Ocean beds
- (d)
Rocks
The component of a chromosome that controls heredity is
- (a)
DNA
- (b)
RNA
- (c)
Histones
- (d)
Proteins
Select the group which shares maximum no. of common characters
- (a)
Two individuals of a species
- (b)
Two species of a genius
- (c)
Two genera of a family
- (d)
Two genera of two families
Test cross is a cross between?
- (a)
Hybrid X Hybrid parent
- (b)
Hybird X Recessive parent
- (c)
Hybrid X Dominant parent
- (d)
Two distantly related species
Disease resistant varieties can be produced by
- (a)
crossing a plant with wild variety
- (b)
treating with colchicine
- (c)
crossing with hormones
- (d)
treating with low temperature
Allel is the
- (a)
alternate trait of a gene pair
- (b)
total number of genes for a trait
- (c)
total number of chromosomes of haploid set
- (d)
total number of genes present a chromosome
Plants having similar genotypes produced by plant breeding are called
- (a)
clone
- (b)
haploid
- (c)
autopolyploid
- (d)
genome
Guanine pairs with
- (a)
Adenine
- (b)
Cytosine
- (c)
Thymine
- (d)
None of these
Mendel formulated the law of purity of gametes on the basis of
- (a)
dihybrid cross
- (b)
monohybrid cross
- (c)
backcross
- (d)
test cross
In monohybrid cross what is the ratio of homozygous dominant and homozygous recessive individual in F2-generation?
- (a)
1:2:1
- (b)
2:1/1:2
- (c)
3:1/1:3
- (d)
1:1
A white flowered Mirabilis plant rr was crossed with a red coloured RR, if 120 plants are produced in F2 generation. The result would be
- (a)
90 uniformly coloured and 30 white
- (b)
60 Non-uniformly coloured and 30 white
- (c)
60 Non-uniformly coloured and 60 white
- (d)
All coloured and No white
A white flowered Mirabilis plant rr was crossed with a red coloured RR, if 120 plants are produced in F2 generation. The result would be
- (a)
90 uniformly coloured and 30 white
- (b)
60 Non-uniformly coloured and 30 white
- (c)
60 Non-uniformly coloured and 60 white
- (d)
All coloured and No white
Which one of the following traits of garden pea studied by Mendel was a recessive feature?
- (a)
Green seed colour
- (b)
Green pod colour
- (c)
Round seed shape
- (d)
Axial flower position
The term genome is used for:
- (a)
diploid set of chromosomes
- (b)
polyploid set of chromosomes
- (c)
triploid set of chromosomes
- (d)
haploid set of chromosomes
Recessive gene can express only in:
- (a)
homozygous condition
- (b)
heterozygous conditio
- (c)
both above conditions
- (d)
none of the conditions
If a heterozygous tall plant is crossed with a homozygous dwarf plant, the proportion of dwarf progeny will:
- (a)
50%
- (b)
75%
- (c)
100%
- (d)
25%
The year 1900 AD is highly significant for genetics due to:
- (a)
Principle of linkage
- (b)
Chromosome theory of heredity
- (c)
Rediscovery of Mendelism
- (d)
Discovery of genes
"Struggle for existence" and survival of fittest are associated with:
- (a)
Lamarkism
- (b)
Oparin hypothesis
- (c)
Mendelism
- (d)
Darwinism
In nature, the process by which different organisms evolve similar traits is called
- (a)
genetic drift
- (b)
artificial selection
- (c)
divergent evolution
- (d)
convergent evolution
Which of the following is not a vestigial organ in man
- (a)
wisdom tooth
- (b)
vermiform appendix
- (c)
ileum
- (d)
muscles of ear pinna
"Ontogeny repeats phylogeny" was coined by
- (a)
Darwin
- (b)
Lamarck
- (c)
Morgan
- (d)
Haeckel
By studying analogous structures we look for
- (a)
similarities in appearance and function but different in structure
- (b)
similarities in appearance but differences in functions
- (c)
Similarities in organ structure
- (d)
Similarities in cell make up
Arrange following in the sequence
(A) Mutation
(B) Reproductive isolation
(C) Natural Selection
(D) Evolution
- (a)
A,B,C,D
- (b)
D,C,B,A
- (c)
A,C,B,D
- (d)
C,B,A,D
Double helical structure of DNA was given by
- (a)
Frederick Meisher
- (b)
J.D. Watson
- (c)
F.H.C. Crick
- (d)
Watson and crick
Two allelic genes are located on
- (a)
the same chromosome
- (b)
two homologous chromosomes
- (c)
two non-homologous chromosome
- (d)
any two chromosomes
Mendel's second law is the law of
- (a)
Independent assortment
- (b)
segregation
- (c)
Dominance
- (d)
polygenic inheritance
