Question
Biology Question on cell cycle and cell division
During meoisis I, chromosomes start pairing at
A
Pachytene
B
Diplotene
C
Leptotene
D
Zygotene
Answer
Zygotene
Explanation
Solution
During zygotene or zygonema of meiotic prophase I the chromosomes become shorter and thicker. The homologous chromosomes come to lie side-by-side in pairs. This pairing of homologous chromosomes is known as synapsis, or syndesis. A pair of homologous chromosomes lying together is called a bivalent.