If an organism has 14 chromosomes, the number of chromosomes generated by nullisomy will be:
A) 15
B) 7
C) 12
D) 13
In animals, cytological study of crossing over was done by:
A) Barbara McClintock
B) Stern
C) Creighton
D) Mendel
Colchicine affects which of the following?
A) Cytokinesis
B) Synapsis
C) DNA synthesis
D) Spindle fiber formation
Monoploids are represented by:
A) π
B) 2n
C) 2n-1
D) x
Chromosome map is also known as:
A) Genetic map
B) Linkage map
C) Both of the above
D) None of these
The interchange of parts between non-homologous chromosomes is called:
A) Deletion
B) Inversion
C) Translocation
D) Duplication
Translocation leads to the exchange of segments between:
A) Homologous chromosomes
B) Sister chromatids
C) Non-homologous chromosomes
D) None of them
In Drosophila males, there is complete linkage. What is the reason behind this?
A) The genes are very closely located
B) Coupling theory
C) Absence of recombination
D) Unknown reason
Terminalization of chiasma occurs during:
A) Leptotene
B) Zygotene
C) Pachytene
D) Diplotene
Linkage and crossing-over are proportional:
A) Directly
B) Positively
C) Negatively
D) Inversely

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