Experimental evidence for the existence of polygenes was provided by:
A) Yule
B) East
C) Nilsson-Ehle
D) Mather
Choose the correct statement:
A) Genetic variation in a character is the prerequisite for any improvement in the trait
B) Land races have more genetic diversity, wider adaptability, broad genetic base, and high degree of resistance to biotic and abiotic stress
C) Existence of phenotypic differences among the different individuals of a population is called as variation
D) All of these
Choose the correct statement:
A) The differences among individuals of a single species for a character is called variation
B) Transgressive segregants fall outside the limits of both parents
C) Nilsson-Ehle provided the genetic basis for transgressive segregation in wheat and oats
D) All of these
The term Polygene and Oligogene was given by:
A) Yule (1906)
B) East (1916)
C) Nilsson-Ehle (1908)
D) Mather (1941)
Qualitative character is also called:
A) Oligogenic trait
B) Major gene character
C) Monogenic trait
D) All of these
Quantitative character is also called:
A) Multiple factor character
B) Polygenic trait
C) Minor gene character
D) All of these
Choose the correct statement:
A) Quantitative character is also called variable character
B) Hidden (Potential) variability from homozygotes is released by outcrossing
C) Potential variability from heterozygotes is released by selfing or inbreeding
D) All of these
Choose the correct statement:
A) Polygenic traits are measured in terms of colour, shape, surface, size etc.
B) Oligogenic characters are measured in terms of height and weight, length and width, duration etc.
C) Transgressive segregation is possible in polygenic traits
D) All of these
Genetic variability can be created by:
A) Somaclonal variation and somatic hybridization through protoplast fusion
B) Mutagenesis and polyploidy
C) Sexual hybridization
D) All of these
Choose the incorrect statement:
A) Transgressive segregants are only possible from the cross between two parents with mean values for a quantitative trait
B) Transgressive segregation is the production of plants in F1 generation that are superior to both the parents for one or more characters
C) Transgressive segregation is possible in oligogenic trait
D) During the transfer of a polygenic trait through the backcross method, F1 and F2 generations are raised after each backcross generation

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