1.

Question : Two heterozygous parents are crossed. If the two loci are linked, what would be the distribution of phenotypic features in F_1generation for a dihybrid cross?

Answer»

Solution : If the two loci are linked, there will be two possibilities:
(a) If the genes are completely linked: In the CASE of COMPLETE linkage, all the offspring will show parental phenotypes. (B) If the genes are incompletely linked: In incomplete linkage, there is occurrence of crossing over and new combinations are FORMED but the parental combinations are more NUMEROUS than the new or nonparental combinations.


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