SAT Biology - Genetics and Evolution
Exam Duration: 45 Mins Total Questions : 30
Alternative forms of a gene are called ______
- (a)
Loci
- (b)
Multiples
- (c)
Chromosomes
- (d)
Alleles
Heredity or inheritance of specific traits became clearer due to
- (a)
Lamarck's theory
- (b)
Mendel worked on garden peas
- (c)
Darwinism
- (d)
Neo-Darwinism
What will be the genotypic ratio of the cross between Rr and rr?
- (a)
1:2:1
- (b)
3:1
- (c)
1:1
- (d)
1:1:1
In man the chromosome number is 46. How many chromosomes are present in man's muscle cells?
- (a)
23
- (b)
46
- (c)
69
- (d)
Variable
________ was a predecessor of Darwin's and developed the theory of acquired characteristics
- (a)
Weismann
- (b)
Mendel
- (c)
Malthus
- (d)
Lamarck
Which of these is not a living fossil?
- (a)
Archaeopteryx
- (b)
Duck-billed platypus
- (c)
Lungfish
- (d)
Frog
Human being belongs to the species of _______
- (a)
Homo erectus
- (b)
Homo habillis
- (c)
Homo sapiens
- (d)
Hominidae
Links between organisms that show branching pattern of evolutionary relationships are shown by _______
- (a)
Living fossils
- (b)
Comparative embryology
- (c)
Phylogenetic trees
- (d)
Two fossil layers
Non geographic speciation can be found in _____
- (a)
Parapatric speciation
- (b)
Peripatric speciation
- (c)
Allopatric speciation
- (d)
Sympatric speciation
In dogs the chromosome number is 78. How many chromosomes are present in the dog sperm?
- (a)
78
- (b)
39
- (c)
Cannot determine from this information
- (d)
Variable
Homologous chromosomes which are similar in both the sexes are called ______
- (a)
Sex chromosomes
- (b)
Autosomes
- (c)
Allosomes
- (d)
Androsomes
How many pairs of contrasting characters of pea were selected by Mendel for cross fertilization?
- (a)
Six
- (b)
Seven
- (c)
Five
- (d)
Twelve
Genetic information is carried out by long chain of molecules made up of:
- (a)
Phosphates
- (b)
M RNA
- (c)
Nucleotides
- (d)
None of these
The Genotypic Ratio of a mono hybrid cross in F2 Generation is:
- (a)
3:1
- (b)
2:1
- (c)
1:2:1
- (d)
1:3
A trait in an offspring is influenced by
- (a)
DNA of mother gamete
- (b)
DNA of father gamete
- (c)
Both DNAs of father and mother gamete
- (d)
Neither of mother or father gamete DNA
First photosynthetic organisms to develop on Earth were
- (a)
Bacteria
- (b)
Cyanobacteria
- (c)
Green algae
- (d)
Diatoms
Life cannot originate from inorganic materials at present because of
- (a)
High degree of environmental pollution
- (b)
A very high amount of oxygenin the atmosphere
- (c)
Very low atmospheric pressure
- (d)
Absence of raw materials
Chemical theory of origin of life was proposed by
- (a)
Miller
- (b)
Pasteur
- (c)
Oparin and Haldane
- (d)
Darwin
Resemblance between widely different groups due to a common adaptation is
- (a)
Parallax evolution
- (b)
Divergent evolution
- (c)
Convergent evolution
- (d)
Retrogressive evolution
Which one is not a vestigial organ in humans?
- (a)
Epiglottis
- (b)
Vermiform appendix
- (c)
Wisdom teeth
- (d)
Scalp hair
Archaeopteryx is a missing link between:
- (a)
Fishes and amphibians
- (b)
Birds and reptiles
- (c)
Fishes and Birds
- (d)
Birds and mammals
Which one provides direct and solid evidence in favor of organic evolution through ages?
- (a)
Atavism
- (b)
Paleontology
- (c)
Vestigial organs
- (d)
Galapagos island fauna
'Survival of Fittest' was used by
- (a)
Charles Darwin
- (b)
Herbert Spencer
- (c)
J.B. Lamarck
- (d)
Hugo de Vries
Continuity of germplasm theory was given by
- (a)
De Vries
- (b)
Weismann
- (c)
Darwin
- (d)
Lamarck
Natural selection really means
- (a)
Struggle for existence
- (b)
Differential Reproduction
- (c)
Survival of the fittest
- (d)
Elimination of the unfit
Which factor of Darwin's theory of natural Selection is not correct?
- (a)
Excessive multiplication
- (b)
Struggle for existence
- (c)
Inheritance of useful variations
- (d)
Natural selection (survival of fittest).
Genetic Drift is a change of
- (a)
Gene frequency in same generation
- (b)
Appearance of recessive genes
- (c)
Gene frequency from one generation to another
- (d)
None of the above
Cause of Speciation is
- (a)
Random mating
- (b)
Hybridization
- (c)
Isolation
- (d)
Migration
Which book was written by Charles Darwin?
- (a)
Origin of species
- (b)
Species planetarium
- (c)
Genera planetarium
- (d)
De Naturien Famillien
Speciation leads to
- (a)
Increase in number of species
- (b)
Decrease in number of species
- (c)
Maintenance of number of species
- (d)
All these
