1. Choose the correct one**
(i) Variability present among different genotypes of a species is known as genetic diversity
(ii) Genetic diversity variation is an estimate of deviation of sample mean from population mean
(iii) Genetic diversity arises due to geographical separation and genetic barrier to crossability
(iv) Both (i) and (iii)
2. The sum of all the observations in a sample divided by their number relates to**
(i) Arithmetic mean
(ii) Standard error
(iii) Coefficient of variation
(iv) Range
3. Genetic diversity can be assessed by**
(i) D² statistics
(ii) Metroglyph analysis
(iii) Both (i) and (ii)
(iv) None of these
4. The concept of D² statistics was first given by**
(i) Anderson 1957
(ii) R.A. Fisher 1918
(iii) Mahalanobis 1928
(iv) C.R. Rao 1952
5. Who first suggested the use of D² statistics for assessment of diversity in plant breeding?**
(i) C.R. Rao (1952)
(ii) Anderson (1957)
(iii) R.A. Fisher (1918)
(iv) P.C. Mahalanobis (1928)
6. Choose the correct one**
(i) D² statistics is a statistical procedure, which is used for the measurement of genetic diversity present among a group of varieties, strains, lines etc. of species
(ii) Maximum heterosis generally occurs at an optimal or intermediate level of genetic diversity between the parents
(iii) The degree of heterosis increases with the degree of divergence
(iv) All of these
7. Which of the following statement regarding D² statistics is incorrect**
(i) It is based on second order statistics
(ii) Analysis is applicable in replicated data only
(iii) The clusters, which are separated by largest distance show maximum divergence
(iv) The genotype grouped together in different clusters is less divergent than placed in single cluster
8. A line diagram which is drawn in D² statistics to depict genetic diversity for various characters is known as**
(i) Glyph
(ii) Cluster diagram
(iii) Vr–Wr graph
(iv) Solid circle diagram
9. Metroglyph analysis was developed by**
(i) C.R. Rao (1952)
(ii) Anderson (1957)
(iii) P.C. Mahalanobis (1928)
(iv) R.A. Fisher (1918)
10. Which of the following statement regarding metroglyph analysis is correct**
(i) It is a semigraphic method of studying variability in a large number of germplasm lines taken at a time
(ii) It is a technique to investigate the pattern of morphological variations in crop species
(iii) A small circle which depicts the position of a genotype on the graph in metroglyph analysis is called as glyph
(iv) All of these
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