Choose the correct statement
A) The frequency of recombination between genes may be as low as zero percent but it never exceeds 50 percent
B) Linked genes are located in the same linkage group, and the strength of linkage is determined mainly by the distance between the concerned genes
C) If two favorable genes are closely linked together, selection for any one of them is adequate
D) All of these
Choose the correct statement
A) Some genes are closely linked so that they produce a low frequency of recombination; such genes are called tightly linked
B) When large numbers of observations on quantitative characters are plotted in a frequency distribution curve, a bell-shaped normal curve is produced
C) The variance in P₁, P₂, and F₁ is due to the environment only, and the variance in F₂ is due to both genetic and environmental components
D) All of these
The multiple factor hypothesis was first postulated by
A) Yule 1906
B) Nilsson-Ehle 1908
C) East 1916
D) Mather 1941
The experimental evidence of the multiple factor hypothesis was given by
A) Yule 1906
B) Nilsson-Ehle 1908
C) East 1916
D) Mather 1941
Choose the incorrect one
A) The multiple factor hypothesis: 1:4:6:4:1
B) Polymeric gene action: 9:6:1
C) Inhibitory gene action: 13:3
D) Supplementary gene action: 12:3:1
Choose the correct statement
A) The chief difference between qualitative and quantitative traits lies in the degree to which they are affected by the environment
B) In most of the quantitative characters, the contribution of the environment varies from 10 to 50%
C) Xeroderma pigmentosum, disease resistance, allergy, etc. are examples of threshold characters
D) All of these
Choose the incorrect statement
A) Production of new combinations of genes as a result of independent assortment of unlinked genes, crossing over between linked genes, or intragenic crossing over is known as recombination
B) The F₁ and subsequent generations obtained through continued selfing of a hybrid are known as segregating generations
C) The segregation of one pair of alleles being independent of that of another pair of alleles is called independent assortment
D) All of these
Who first suggested that genes controlling quantitative traits are transmitted according to the laws of Mendel?
A) Yule
B) Nilsson-Ehle
C) Johannsen
D) Mather
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Who first suggested that the development of a character is influenced by both genotype and environment?
A) Yule
B) Nilsson-Ehle
C) Johannsen
D) Mather
Inheritance of both qualitative and quantitative characters follows the law of
A) Segregation
B) Independent assortment
C) Both (i) and (ii)
D) None of these

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