WorksheetsI Quiz Genetics
Total questions: 20
Worksheet time: 10mins
Genetics is branch of science deals with ___________
Development
Embryo
Heredity
Evolution
Crossing of two plants differing in one character is a dihybrid cross. (State True or False)
Recessive backcross helps to identify the heterozygosity of the parent. (State True or False)
The genotypic ratio of the monohybrid cross is
9:3:3:1
1:2:1
3:1
1:1
Which one of the following is the F2 ratio of complementary genes?
9:3:3:1
1:2:1
9: 7
1:1
A blood group contains antigen ------------ on the RBC.
A
B
C
O
Who proposed the factor hypothesis to explain genic interaction?
Gregor Mendel
Bateson and Punnett
Alexander Fleming
Sturtevant
If a colour blind man marries a normal woman what will be the character expressed by her son?
colour blind
normal
Colour blindness is discovered by -------------------------
Dalton
Morgan
Mendel
Huxley
What is atavism?
A new mutation occurring in an organism
The loss of a trait during evolution
The reappearance of ancestral traits in an organism
A type of artificial selection
In polygenic inheritance, the phenotype is determined by:
A single pair of alleles
Dominant alleles only
The additive effect of multiple genes
Mutations only
Match the following and choose the correct option:
A. Haemophilia - 1. Inability to distinguish between red and green colours
B. Colour blindness - 2. Gene located on the X chromosome
C. Y-linked inheritance - 3. Absence of protein required for blood clotting
D. X-linked inheritance - 4. Gene located on the Y chromosome
A-2, B-1, C-3, D-4
A-1, B-2, C-3, D-4
A-3, B-1, C-4, D-2
A-1, B-3, C-2, D-4
The physical exchange of chromosomal segments is called
Mutation
Replication
Crossing over
Translation
The model that explains homologous recombinationn is
Meselson-Stahl model
Holliday model
Watson-Crick model
Chargaff model
Somatic cell hybridization is used in
Chromosome mapping
DNA replication
Gene therapy
Protein synthesis
Coincidence in chromosome mapping refers to
No crossover
Presence of interference only
Ratio of observed to expected crossovers
Expected double crossovers
Assertion (A): Linked genes tend to be inherited together. Reason (R): They are located close to each other on the same chromosome. Select the correct answer:
Both Assertion (A) and Reason (R) are correct, and Reason (R) is the correct explanation of Assertion (A).
Both Assertion (A) and Reason (R) are correct, but Reason (R) is not the correct explanation of Assertion (A).
Assertion (A) is correct, but Reason (R) is incorrect.
Assertion (A) is incorrect, but Reason (R) is correct.
Assertion (A): Interference decreases the probability of nearby crossovers. Reason (R): Interference prevents all crossing over events in chromosomes. Select the correct answer:
Both Assertion (A) and Reason (R) are correct, and Reason (R) is the correct explanation of Assertion (A).
Both Assertion (A) and Reason (R) are correct, but Reason (R) is not the correct explanation of Assertion (A).
Assertion (A) is correct, but Reason (R) is incorrect.
Assertion (A) is incorrect, but Reason (R) is correct.
Match the following:
A. Recombination frequency - 1. No crossover
B. Somatic cell hybridization - 2. Observed/expected crossover
C. Complete linkage - 3. Distance between genes
D. Coincidence - 4. Mapping in mammals
A-3, B-4, C-1, D-2
A-1, B-2, C-3, D-4
A-3, B-4, C-2, D-1
A-3, B-2, C-1, D-4
Complete linkage results in
All recombinant types
All parental types
Half recombinant, half parental
No gametes
