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The chromosome maps are not accurate maps because (1) Crossing over frequency is higher than recombination frequency (2) One crossing over interferes and increases the frequency of nearby crossing over (3) Crossing over frequency decreases towards the ends of chromosome (4) Heterochromation increases crossing over

The chromosome maps are not accurate maps because
(1) Crossing over frequency is higher than recombination frequency
(2) One crossing over interferes and increases the frequency of nearby crossing over
(3) Crossing over frequency decreases towards the ends of chromosome
(4) Heterochromation increases crossing over

Grade:12th pass

1 Answers

Simran Vinaik
askIITians Faculty 1230 Points
5 years ago
Ans is 2) as linkage chromosome maps do not exactly depict the physical distance amongst genes because:
(i) Interference of one cross-over to the occurrence of another near it by reducing its frequency.
(ii) Heterochromatin reduces the incidence of crossing over.

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