Arabic 1 - "Beef" - difference between male and female pronunciation

In the “More food” section of Arabic 1

I noticed in the word for beef (لحم بقري) the female voice is saying something like “lahm(uh) baqari” (where that uh is a very quick, almost unnoticable schwa) and the male voice is saying something more like “lahmun baqari(yuh)”, with a noticeable n sound before ‘baqari’.

Is the difference between “lahm(uh)” for the woman and “lahmun” for the man because they come from different dialects, or because they are male and female, or something else? If spelled using the optional diacritics and vowel markers, would there be a tanwiin on the male’s version?