6:18ו׳:י״ח
1 א

והקמתי את בריתי. בְּרִית הָיָה צָרִיךְ עַל הַפֵּרוֹת שֶׁלֹּא יִרְקְבוּ וִיעַפְּשׁוּ וְשֶׁלֹּא יַהַרְגוּהוּ רְשָׁעִים שֶׁבַּדּוֹר (ב"ר):

והקמתי את בריתי BUT I WILL ESTABLISH MY COVENANT — A covenant was necessary for the sake of the fruits that they should not rot or decay; and also that the wicked people of that generation should not kill him (Genesis Rabbah 31:12)

2 ב

אתה ובניך ואשתך. הָאֲנָשִׁים לְבַד וְהַנָּשִׁים לְבַד; מִכָּאן שֶׁנֶּאֱסְרוּ בְּתַשְׁמִישׁ הַמִּטָּה: (שם):

אתה ובניך ואשתך THOU, AND THY SONS AND THY WIFE — Males separately and females separately. From this one may infer that they were not permitted to live together in the Ark as man and wife (Sanhedrin 108b).