explIn the formation of zygote
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- Tʜᴇ ᴢʏɢᴏᴛᴇ ɪs ғᴏʀᴍᴇᴅ ᴡʜᴇɴ ᴛʜᴇ ᴍᴀʟᴇ ɢᴀᴍᴇᴛᴇ (sᴘᴇʀᴍ) ᴀɴᴅ ғᴇᴍᴀʟᴇ ɢᴀᴍᴇᴛᴇ (ᴇɢɢ) ғᴜsᴇ. Bʟᴀsᴛᴏᴄʏsᴛ sᴛᴀɢᴇ: Tʜᴇ sɪɴɢʟᴇ-ᴄᴇʟʟᴇᴅ ᴢʏɢᴏᴛᴇ ʙᴇɢɪɴs ᴛᴏ ᴅɪᴠɪᴅᴇ ɪɴᴛᴏ ᴀ sᴏʟɪᴅ ʙᴀʟʟ ᴏғ ᴄᴇʟʟs. Tʜᴇɴ, ɪᴛ ʙᴇᴄᴏᴍᴇs ᴀ ʜᴏʟʟᴏᴡ ʙᴀʟʟ ᴏғ ᴄᴇʟʟs ᴄᴀʟʟᴇᴅ ᴀ ʙʟᴀsᴛᴏᴄʏsᴛ, ᴀᴛᴛᴀᴄʜɪɴɢ ᴛᴏ ᴛʜᴇ ʟɪɴɪɴɢ ᴏғ ᴛʜᴇ ᴍᴏᴛʜᴇʀ's ᴜᴛᴇʀᴜs.
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