Which of the following is not true about cleavage? Choose all possible answers. a. “Making more cells” b.“Separating from one into two cells” c.mitotic spindle that plays a central role in this process d.arrangement of germ layers e.suppression of G1 and G2 phases of cell cycle f. can be classified based on amount of yolk present

Which of the following is not true about cleavage? Choose all possible answers. a. “Making more cells” b.“Separating from one into two cells” c.mitotic spindle that plays a central role in this process d.arrangement of germ layers e.suppression of G1 and G2 phases of cell cycle f. can be classified based on amount of yolk present

Human Biology (MindTap Course List)

11th Edition

ISBN:9781305112100

Author:Cecie Starr, Beverly McMillan

Publisher:Cecie Starr, Beverly McMillan

Chapter17: Development And Aging

Section: Chapter Questions

Problem 2SQ: During cleavage, the _______ is converted to a ball of cells, which in turn is transformed into the...

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Which of the following is true about Cleavage? Choose all possible answers a. At the end of cleavage, a 32-cell zygote called morula is formed. b. The angle and timing of mitotic spindle influence the pattern of embryonic cleavage. c. Cleavage is a series of mitosis that happens after the formation of zygote. d. The yolk protein is essential in determining where cleavage can occur
Which of the following statements is/are true? A. Spermatogenesis is an example of asymmetric cell division. B. The formation of a mature egg occurs through symmetric cell division. C. Spermatogenesis and oogenesis are both examples of asymmetric cell division. D. Spermatogenesis involves only symmetric cell division whereas oogenesis involves asymmetric cell division.
In cleavage states what is blastomeres, 2-cell stage, 4-cell stage, and 8-cell stage.
Which of the following examples of cell division would involve meiosis? Group of answer choices A. a spermatocyte divides into sperm cells B. a sperm cell fertilizes an egg cell C. a white blood cell divides into new white blood cells D. a stem cell divides into nerve cells E. a fertilized egg divides into daughter cells
One day while walking across campus, you see a female butterfly laying fertilized eggs, as shown in the image below: 1. When the female butterfly’s eggs are fertilized, the fusion (2N) nucleus will divide repeatedly giving rise to cleavage nuclei, which: a. can become trophocytes that migrate into the germarium and connect to the developing embryo by nutritive cords. b. can migrate to the periplasm and become cleavage cells that ultimately give rise to the germ band and the serosa. c. can migrate to the peripheral cytoplasm and become germ cells, which eventually move into the forming gonads and become oogonia or spermatogonia. d. can remain in the yolk and become vitellophages that digest the yolk and make nutrients available to the forming embryo. e. only b and c f. only a and d g. all except a h. all except d 2. In the mature, unfertilized egg of the adult female butterfly: a. bicoid mRNAs will congregate at the end of the…
Cell differentiation occurs through _______________, whereas morphogenesis involves _______________. (a) pattern formation; cell determination (b) cell division; cell expansion (c) cell expansion; pattern formation (d) cell determination; cell division (e) cell determination; pattern formation
Cells at the 4 cell stage of an embryo are _______ compared to cells at the 32 cell stage of the same embryo? Group of answer choices A. larger B. smaller and more differentiated C. about the same size D. smaller E. smaller and less differentiated
which of the following events occurs during anaphase B in a mitotic cell a. lengthening of the overlap microtubules b. Shortening of the overlap microtubules c. Shortening of the overlap microtublues d. Shortening of the astral microtubules e. Lengthening of the kinetochore microtubules
Which of the following stages of the fertilization process stimulates completion of meiosis II in the oocyte’s nucleus? A. The sperm nucleus and egg nucleus combine to form the genetic material of the zygote B. Sperm release enzymes to digest the protein layer of the secondary oocyte C. The entry of a sperm into the secondary oocyte D. The swimming of sperm from the vagina, through the uterus, and up to an oviduct
Why isn't the answer epiblast and hypoblast? Doesn't the entirety of the inner cell mass contribute to cells forming the embryo?
Why is the frog pattern of cleavage different from the sea urchin pattern of cleavage? Group of answer choices A. the frog cells all divide at the same rate and are all the same size B. the frog vegetal pole cells divide more slowly and are large and yolk-filled C. the frog vegetal pole cells divide more slowly and are small D. the yolk does not divide in the frog E. the blastopore forms the mouth
Describe the changes in synthesis that occur at the end of cleavage(time point 5 corresponds to cell division 12).