Question

What happens in the phase of leptotene in the duplicated sister chromatids?

Answer 1

Meiosis:

1. It's a sort of cell division in which the parent cell's chromosome count is halved and four gamete cells are produced.
2. This procedure is crucial to the formation of egg and sperm cells for sexual reproduction.

Phases in meiosis:

1. Meiosis is divided into two phases, both of which are followed by mitosis (prophase, metaphase, anaphase, telophase).
2. Leptotene, zygotene, pachytene, diplotene, and diakinesis are the five phases of meiotic prophase I.
3. Homologous chromosomes couple, synapse, and create crossovers during the prophase of meiosis I.

Leptotene phase:

1. To commence meiotic recombination, homologous chromosomes couple and programmed DNA double-strand breaks (DSBs) are created during the leptotene stage.
2. During the leptotene stage, duplicated chromosomes condense from diffuse chromatin into long, thin strands that are more apparent inside the nucleoplasm.