Question

Choose the wrong option.

(a) Paracentric inversion cross over products is non-viable

(b) Pacentric non-cross over gametes segregates normally

(c) Double cross over in paracentric inversion is lethal

(d) There is genetic imbalance in gametes produced by paracentric inversion cross over

I got this question in an online interview.

Question is from Chromosomal Abnormality : Inversion in section Chromosomal Basis of Inheritance of Cytogenetics

Answer 1

Right option is (c) Double cross over in paracentric inversion is lethal

For explanation: In paracentric inversion there is chromosomal imbalance in products of single cross over, but double cross over products lead to normal gene balance and viable gametes.