1. The type of linkage where only parental character combinations are recovered in F₂ or test cross progeny is known as
(i) Incomplete linkage
(ii) Complete linkage
(iii) Both (i) and (ii)
(iv) None of these
2. The type of linkage where recombinant type of individuals are observed in test cross progeny is known as
(i) Incomplete linkage
(ii) Complete linkage
(iii) Both (i) and (ii)
(iv) None of these
3. The type of linkage where dominant alleles of the linked genes are present in the same chromosome is known as
(i) Coupling phase
(ii) Repulsion phase
(iii) Both (i) and (ii)
(iv) None of these
4. The type of linkage where dominant alleles of some genes are present with recessive alleles of other genes in the same chromosome is known as
(i) Coupling phase
(ii) Repulsion phase
(iii) Both (i) and (ii)
(iv) None of these
5. Choose the correct statement
(i) The frequency of recombination between genes may be as low as zero percentage but it never exceeds 50 percent
(ii) Linked genes are located in the same linkage group and the strength of linkage is determined mainly by the distance between the concerned genes
(iii) If two favourable genes are closely linked together, selection for any one of them is adequate
(iv) All of these
6. Choose the correct statement
(i) Some genes are closely linked so that to produce low frequency of recombination, such genes are called as tightly linked
(ii) When large numbers of observations on quantitative characters were plotted in a frequency distribution curve a bell shaped normal curve produced
(iii) The variance in P₁, P₂ and F₁ is due to environment only and the variance in F₂ is due to both genetic and environmental components
(iv) All of these
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