1. The continuous variation in minor gene character are due to
(i) The cumulative effect of several genes
(ii) Marked effect of environment on the expression of the characters
(iii) Both (i) and (ii)
(iv) None of these
2. Choose the incorrect statement
(i) The sum of genetic and environmental variances gives an estimate of the phenotypic variance
(ii) Total variation present in a population arises due to genotypic and environmental effects
(iii) Phenotype is the result of a joint action of genotype and environment
(iv) Polygenic trait show discontinuous variation hence classification into clear-cut groups is possible
3. Term character was given by
(i) Yule (1906)
(ii) East (1916)
(iii) Nilsson-Ehle (1908)
(iv) Bateson 1907
4. Influence of environment on qualitative trait is
(i) Least affected
(ii) Moderately affected
(iii) Highly affected
(iv) None of these
5. Polygenes has
(i) Cumulative micro effect
(ii) Cumulative macro effect
(iii) Cumulative micro and macro effect
(iv) None of these
6. Transmission of genes governing various characters from parents to offspring is called as
(i) Polygenic inheritance
(ii) Oligogenic inheritance
(iii) Inheritance
(iv) Both (i) and (ii)
7. The mode of inheritance of qualitative character is called as
(i) Polygenic inheritance
(ii) Oligogenic inheritance
(iii) Inheritance
(iv) Both (i) and (ii)
8. The mode of inheritance of quantitative character is called as
(i) Polygenic inheritance
(ii) Oligogenic inheritance
(iii) Inheritance
(iv) Both (i) and (ii)
9. Choose the incorrect statement
(i) Mendel proposed the law of inheritance based on qualitative characters
(ii) Inheritance pattern of both qualitative and quantitative characters follows Mendel’s laws of inheritance but differ in both magnitude and mode of action.
(iii) Number of genes involved in the control of quantitative traits can be estimated by two methods i.e. Castle-Wright segregation index given and inbred-backcross and genotype assay method
(iv) All of these
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