Characters governed by polygenes but showing discontinuous variation are known as:
A) Oligogenic characters
B) Polygenic characters
C) Quasi-quantitative characters
D) Variable character
Which of the following examples deal with quasi-quantitative characters:
A) Grains per spike and tillers per plant
B) Seeds per pod
C) Kernel color in wheat
D) All of these
Choose the incorrect statement:
A) Qualitative characters are controlled by one or a few genes
B) The effect of a single gene is large and easily detectable in quantitative characters
C) The effect of a single gene is small and not easily detectable in qualitative characters
D) Both (ii) and (iii)
Choose the incorrect statement:
A) Classification of quantitative characters into distinct classes is possible
B) Classification of qualitative characters into distinct classes is not possible
C) Metric measurement in quantitative characters is not possible
D) All of these
Choose the correct statement:
A) Qualitative traits are less influenced by environmental changes
B) Polygenic characters exhibit discontinuous variation
C) Transgressive segregants are only possible in oligogenic characters
D) All of these
Choose the correct statement:
A) Statistical analysis of qualitative traits is based on mean, variances, and covariances
B) Statistical analysis of quantitative traits is based on frequencies and segregation ratios
C) Oligogenic characters exhibit discontinuous variation
D) Transgressive segregants are not possible in polygenic characters
Choose the incorrect statement:
A) Qualitative traits are primarily governed by non-additive gene action
B) Quantitative traits are primarily governed by additive gene action (also governed by non-additive gene action)
C) Improvement of polygenic characters is difficult mainly due to the large numbers of genes and poor heritability
D) All of these
Which of the following correlates the similarities between quantitative and qualitative traits:
A) Both are governed by genes
B) Both polygenes and oligogenes are located on the chromosome of a nucleus
C) Both show variation, segregation, mutation, genetic interaction, linkage, Mendelian inheritance, and reciprocal cross schemes
D) All of these
Classification of quantitative characters into distinct classes is not possible due to:
A) Continuous variation from one extreme to the other
B) Discontinuous variation from one extreme to the other
C) Both (i) and (ii)
D) None of these
20. Variability deals with:
A) Presence of difference among individuals of a plant population
B) Phenotypic differences present among the genotypes of a population
C) Both (i) and (ii)
D) None of these

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