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.

次级泡中的初级母细胞还是停留在第一次减数分裂前，而泡多了几层颗粒细胞，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 历来被分成一系列的亚阶段，根据的外观来命名。

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

第一阶段从婴儿到青春，初级母细胞还停留在第一次减数分裂的前。

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，单变短变厚。

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

减数分裂 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.

减数分裂 1 按下步骤进行：前 1前 1 通常是减数分裂的最长时。

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 的这一阶段，单个，每个由两个姐妹单组成，变得“个化”，在细胞核内形成可见的丝。