Patnership business partion in Muslim joint family.

A man namely, Mohammad Atim married three woman, first wife name is Aasma khatoon, second wife name is Shamsa khatoon and third wife name is Sayeeda khatoon. From first wife there is one son namely, Md. Shamim, from second wife there is no issue and from third wife there is also one son namely, Mohammad Nasim. Mohammad Atim and his first’s wife son Mohammad Shamim starting a partnership business in 50:50 percent ratios. From this business profit’s, some properties were also purchased. One property in name of second wife Shamsha khatoon by way of registered sale deed, two property in name of third wife Sayeeda khatoon by way of ladabi and registered sale deed, two property in name of third wife son's Md. Nasim by way of registered gift and sale deed and one property in name of third wife son's wife Perween Kauser by way of registered sale deed but not a single property purchased in the name of Mohammad shamim (first wife’s son). Now, my question is - A. Is there any types of existence of joint family business in Muslim? B. There is no property purchased in name of first wife son’s Mohammad Shamim, and then what is the share of Mohammad Shamim in properties of Shamsa khatoon, Sayeeda khatoon and Mohammad Nasim, Mohammad Nasim's wife Peveen Kauser which is purchased from partnership business.