meroblastic造句

• The different cells derived from cleavage, up to the meroblastic ( partial ).
• This is in comparison to meroblastic division in birds and platypuses, which causes the ovum to split but not completely.
• During cytokinesis, centrolecithal zygotes undergo meroblastic cleavage, where the cleavage plane extends only to the accumulated yolk and is superficial.
• On the other hand, meroblastic cleavage occurs in animals whose eggs have more yolk; i . e . birds and reptiles.
• In the presence of a large amount of yolk in the fertilized egg cell, the cell can undergo partial, or meroblastic, cleavage.
• The zygotes of monotremes, however, undergo meroblastic division ( as in birds and reptiles ), which causes the ovum to split but not completely.
• The key concept is the notion of meroblastic cleavage, which is to say, when the egg is fertilized and begins dividing, the cells produced are initially content to divide themselves up on the surface without developing cell membranes separating themselves from the yolk beneath.