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Home » General Knowledge » General Science » Aptitude Test - 14
1.What is an allele?
A. Characteristics of an organism
B. Alternate forms of genes
C. Homologous chromosomes
D. Characteristics of an organism
2.Which of the following is NOT Mendel’s law of inheritance?
A. Law of dominance
B. Law of segregation
C. Law of hetrozygous
D. Law of dominance
3.Out of the following, which law is also known as the law of purity of gametes?
A. Law of co-dominance
B. Law of independent assortment
C. Law of segregation
D. Law of co-dominance
4.Name the cross by which law of independent assortment inferred?
A. Dihybrid cross
B. Monohybrid cross
C. Test cross
D. Dihybrid cross
5.Which of the following is an example of incomplete dominance?
A. AB blood group
B. Mirabilis jalapa
C. Mouse coat colour
D. AB blood group
6.The Phenomenon of two or more than two genes affecting the expression of each other is called?
A. Crossing over
B. Pairing
C. Gene interaction
D. Crossing over
7.Which of the following ratio shows complementary gene interaction?
A. 9:7
B. 15:1
C. 1:2:1
D. 9:7
8.Which of the following does not show Mendel’s law of inheritance?
A. Masking gene interaction
B. Epistasis
C. Supplementary gene interaction
D. Masking gene interaction
9.What is epistasis?
A. Type of linkage
B. Masking or modifying gene effect
C. Upper portion of a chromosome
D. Type of linkage
10.Which of the following is NOT the type of epistasis?
A. Dominant
B. Recessive
C. Collabrative
D. Dominant
11.Choose the correct ratio, which shows the masking gene interaction?
A. 12:3:1
B. 9:3:4
C. 1:2:1
D. 12:3:1
12.Name the phenomenon where two genes have the same expression of the character?
A. Pleiotropy
B. Phenocopy
C. Penetrance
D. Pleiotropy
13.What is psudoallele?
A. Allele with similar function
B. Allele with similar structure
C. Alleles with similar function and structure
D. Allele with similar function
14.Name the effect which shows the change in expression of alleles of the gene due to a specific environmental condition?
A. Pleiotropy
B. Linkage
C. Phenocopy
D. Pleiotropy
15.The tendency of two or more than two genes to stay together during inheritance is called?
A. Genetics
B. Gene interaction
C. Crossing over
D. Genetics
16.Which of the following statement is NOT true regarding linkage group?
A. Group of physically linked genes
B. Represent a haploid number of chromosomes
C. Shown by linkage map
D. Group of physically linked genes
17.What is the unit of linkage map?
A. Morgan
B. Centi-morgan
C. Centimeter
D. Morgan
18.What is the maximum percentage of recombination frequency between two genes?
A. 75%
B. 100%
C. 50%
D. 75%
19.Name the phenomenon which can break the occurrence of linkage?
A. Crossing over
B. Linkage
C. Reconstruction
D. Crossing over
20.Failure in which of the following phenomenon would result in linkage?
A. Law of dominance
B. Law of segregation
C. Law of independent assortment
D. Law of dominance
21.Name the organism whose first genetic map was made?
A. Rat
B. Arabidopsis
C. Fly
D. Rat
22.Two genes are 70cM apart, calculate the recombination frequency?
A. 50%
B. 100%
C. 25%
D. 50%
23.Name the sites of DNA, which have a high probability of crossing over?
A. Cold spots
B. Hot spots
C. Covalent bond
D. Cold spots
24.Traits which show continuous variation is referred as ?
A. Genetic disorders
B. Phenotypic variation
C. Quantitative traits
D. Genetic disorders
25.Which of the following factor does not contribute to quantitative traits?
A. Polygenes
B. Environmental
C. Genetic
D. Polygenes
26.Who explained the multifactorial hypothesis?
A. Nilsson-Ehle
B. Mendel
C. Darwin
D. Nilsson-Ehle
27. Which of the following describes the dissimilarity in the traits due to the variation in genetic factors?
A. Polygenic
B. Heritability
C. Quantitative trait loci
D. Polygenic
28.Which of the following describes the inheritance controlled by cytoplasmic genes?
A. Extranuclear inheritance
B. Heritability
C. Environmental factors
D. Extranuclear inheritance
29.Which of the following is NOT true for cytoplasmic inheritance?
A. Reciprocal cross is always different
B. Unequal contribution from male and female gametes
C. It follows a Mendelian pattern of inheritance
D. Reciprocal cross is always different
30.What is a petite mutant?
A. Maternal effect genes
B. Dwarfism
C. Plastid function mutant
D. Maternal effect genes
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