A) homozygosity
B) heterozygosity
C) linkage
D) both (b) and (c)
Correct Answer: A
Solution :
Johannson (1903) proposed the concept of pure line while studying with Phaseolus vulgaris (French bean). Pure line breeds refer to homozygosity because these are formed by the progeny of a single homozygous plant by self-pollination. Thus, all the pure line breeds have the same genotype. The differences within a pure line breeds are due to the environmental conditions, these differences are not heritable.
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