Is there a realtime molecular clock within the genome to co-ordinate the developmental sequences in an embryo?
It is difficult to assume that the massive number of co-ordinated developmental sequences in a developing embryo is controlled by molecular signalling alone. Is anyone aware of a molecular or ...
Someone told me that primitive lymph nodes do not exist during this week. However, others say they can. Here is a picture about inguinal lymph nodes from here. No primary lymph nodes are visible ...
If cytoplasmic determinants are distributed before fertilisation then how can an amphibian's embryo, whose dorsal side is determined after fertilisation develop ?
I am not completely sure where there are cartilage in the eye. I think the developing vitreous body (very light coloured) does not have cartilage. You can assume the eye is during the weeks 11-13 of ...