In a secondary follicle, the primary oocyte is still in the prophase step of meiosis 1, but now the follicle has additional layers of granulosa cells, as well as theca cells.

次级卵泡中的初级卵母细胞还是停留在第一次减前，而卵泡多了几层颗粒细胞，以及卵泡内膜细胞。

Prophase 1 has historically been divided into a series of substages which are named according to the appearance of chromosomes.

前 1 历来被成一系列的亚，根据染色体的外观来命名。

The first stage lasts from infancy to puberty, and during this stage the primary oocyte remains stuck in the prophase step of meiosis 1.

第一婴儿到青春，初级卵母细胞还停留在第一次减的前。

In prophase 2, we see the disappearance of the nucleoli and the nuclear envelope again as well as the shortening and thickening of the chromatids.

在前 2，我们看到核膜消失，染色单体变短变厚。

The four main steps of meiosis 2 are: prophase 2, metaphase 2, anaphase 2, and telophase 2.

减 2 的四个主要步骤是：前 2、中 2、后 2 和末 2。

During prophase 1, homologous chromosomes pair and exchange DNA (homologous recombination) .

在前 1，同源染色体配对并交换 DNA（同源重组）。

Meiosis 1 takes place in following steps: Prophase 1 Prophase 1 is typically the longest phase of meiosis.

减 1 按以下步骤进行：前 1前 1 通常是减的最长时。

Leptotene In this stage of prophase 1, individual chromosomes, each consisting of two sister chromatids, become " individualized" to form visible strands within the nucleus.

细线细线在前 1 的这一，单个染色体，每个染色体由两个姐妹染色单体组成，变得“个体化”，在细胞核内形成可见的染色体丝。