Question

what are mammals in which nucleus are present in rbc cells after getting metured?

Answer 1

no mammals have mature red blood cells with nuclei. However, all red blood cells have nuclei until they complete development and enter circulation. Some animals, such as camelids, tends to have a few circulating red blood cells that have retained their nuclei. However, the vast majority of their red blood cells are anucleate.

Answer 2

In mammals RBC doesnot contain nucleus but when it is young it has nucleus after attaining maturity nucleus disappear because haemoglobin combines with oxygen, so large space can be acquired.