In mammals,egg activation is characterized by all of the following except
A)prevention of entry of other sperm by changes in the egg membrane.
B)stimulation of the egg chromosomes to complete the second meiotic division.
C)one of the two nuclei is extruded from the egg as a second polar body.
D)cytoplasmic movements triggered around the point of sperm entry.
E)the cleavage of sperm nuclei.

Question

Quizplus · Accepted Answer

The cleavage of sperm nuclei is not a characteristic of egg activation. The other options are all characteristics of egg activation in mammals. A) The egg membrane changes to prevent entry of other sperm, ensuring a diploid zygote. B) The egg chromosomes are stimulated to complete meiosis, resulting in the formation of a haploid nucleus. C) The extrusion of the second polar body helps reduce the size of the egg and provides additional cytoplasmic material for the zygote. D) Cytoplasmic movements around the point of sperm entry help redistribute organelles and mRNAs to support early embryonic development.

In Mammals,egg Activation Is Characterized by All of the Following