In flowering plants, male sterility was first reported by:
A) Koelreuter
B) Stout
C) Allard
D) Duvick
Male sterility promotes:
A) Autogamy
B) Allogamy
C) Homogamy
D) None of the above
Male sterility results from the action of:
A) Nuclear genes
B) Chloroplast genes
C) Mitochondrial genes
D) All of these
The male sterile line is referred to as:
A) A-line
B) B-line
C) R-line
D) All of these
The sources of male sterility include:
A) Spontaneous mutations
B) Induced mutations
C) Interspecific crosses
D) All of these
Cytoplasmic genic male sterility system includes:
A) A-line
B) B-line
C) R-line
D) All of these
In male sterility, the pollen is:
A) Abortive
B) Shrivelled
C) Nonfunctional
D) All of these

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