in Fundamentals of Genetics by

1 Answer

0 votes

Homologous chromosomes pair up during leptotene stage of prophase I of first meotic division. Pairing of homologous chromosomes causes the event of crossing over along the segments of chromosomes which give rise to genetic recombination. Hence pairing is required to produce new gene combinations.

Biology Questions and Answers for Grade 10, Grade 11 and Grade 12 students, Junior and Senior High Schools, Junior Colleges, Undergraduate biology programs and Medical Entrance exams.