Principles of Inheritance and Variation Question 116

116. Two linked genes a and b show 20% recombination. The individuals of a dihybrid cross between $++/++$ $\times$ ab/ab shall show gametes

(a) $++80: a b: 20$

(b) $++50: a b: 50$

(c) $++40:$ ab $40:+$ a $10:+b: 10$

(d) $++30:$ ab $30:+$ a $20:+$ b : 20

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Answer : c

Hints & Solution

(c) Two linked genes a and b show 20% recombination. The individuals of a dihybrid cross between $++/++$ $\times$ ab/ab shall show gametes $++40: ab 40:+a 10:+b: 10$.



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