Arrange the cytoplasmic rearrangement of the fertilized egg of the tunicate, Styela partita in consecutive order. (I) After sperm entry into the vegetal hemisphere of the oocyte, the yellow cortical cytoplasm and the clear cytoplasm derived from the breakdown of the oocyte nucleus contract vegetally toward the sperm. (II) Before fertilization, yellow cortical cytoplasm surrounds the gray (yolky) inner cytoplasm. (III) The final position of the yellow cytoplasm marks the location where cells give rise to tail muscles. (IV) As the sperm pronucleus migrates animally toward the newly formed egg pronucleus, the yellow and clear cytoplasm move with it.
Arrange the cytoplasmic rearrangement of the fertilized egg of the tunicate, Styela partita in consecutive order. (I) After sperm entry into the vegetal hemisphere of the oocyte, the yellow cortical cytoplasm and the clear cytoplasm derived from the breakdown of the oocyte nucleus contract vegetally toward the sperm. (II) Before fertilization, yellow cortical cytoplasm surrounds the gray (yolky) inner cytoplasm. (III) The final position of the yellow cytoplasm marks the location where cells give rise to tail muscles. (IV) As the sperm pronucleus migrates animally toward the newly formed egg pronucleus, the yellow and clear cytoplasm move with it.
Human Heredity: Principles and Issues (MindTap Course List)
11th Edition
ISBN:9781305251052
Author:Michael Cummings
Publisher:Michael Cummings
Chapter6: Cytogenetics: Karyotypes And Chromosome Aberrations
Section: Chapter Questions
Problem 11QP: A spermatogonial cell undergoes mitosis before entering the meiotic cell cycle en route to the...
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Arrange the cytoplasmic rearrangement of the fertilized egg of the tunicate, Styela partita in consecutive order.
(I) After sperm entry into the vegetal hemisphere of the oocyte, the yellow cortical cytoplasm and the clear cytoplasm derived from the breakdown of the oocyte nucleus contract vegetally toward the sperm.
(II) Before fertilization, yellow cortical cytoplasm surrounds the gray (yolky) inner cytoplasm.
(III) The final position of the yellow cytoplasm marks the location where cells give rise to tail muscles.
(IV) As the sperm pronucleus migrates animally toward the newly formed egg pronucleus, the yellow and clear cytoplasm move with it.
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