If an embryo was lacking HOX genes many problems might happen including this.. neural crest would not undergo EMT neural progenitors would never form neurons would not form axons The rhombomeres would not form | If a fetus was exposed to a teratogen during week 16, this type of birth defect could be the most likely to occur. congenital heart defect cleft lip and palate limb defects central nervous system defect

If an embryo was lacking HOX genes many problems might happen including this.. neural crest would not undergo EMT neural progenitors would never form neurons would not form axons The rhombomeres would not form | If a fetus was exposed to a teratogen during week 16, this type of birth defect could be the most likely to occur. congenital heart defect cleft lip and palate limb defects central nervous system defect

Biology: The Unity and Diversity of Life (MindTap Course List)

15th Edition

ISBN:9781337408332

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter42: Animal Development

Section: Chapter Questions

Problem 4CT: If an embryo splits at the two-cell stage, each of the resulting identical twins will have its own...

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The olfactory pits form from which of the following? mesoderm cartilage ectoderm endoderm
Your 16-year old friend, Donovan, is a dog lover and dreams tobecome a developmental biologist someday. One afternoon, herushed to you saying that his dog will be pregnant soon.In a maximum of 15 sentences, explain the developmental processesthat will happen to the fertilized ovum.
The placenta is formed from ________.a. the embryo’s mesenchymal cellsb. the mother’s endometrium onlyc. the mother’s endometrium and the embryo’schorionic membraned. the mother’s endometrium and the embryo’sumbilical cord
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Katie was getting nervous. At 16, she was the only one in her group offriends who had not started menstruating. Katie had always dreamedof having three beautiful children someday and she was worried. Hermother took her to see Dr. Josephine, who ordered several blood tests.When the results came back, Dr. Josephine gently explained to Katieand her mother that Katie would never be able to have children andwould never menstruate. Dr. Josephine then asked Katie to wait in theouter room while she spoke privately to her mother. She explained toKatie’s mom that Katie has androgen insensitivity syndrome. ThoughKatie is genetically male and her gonads produce more of the malereproductive hormone, testosterone, than the female reproductivehormone, estrogen, Katie did not reflect the tissue changes expected.What malfunction in Katie’s body would cause this? Why does Katie’sbody look feminine if she is genetically male?
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The 48-hr Chick Embryo Whole Mount (SEE IMAGE) Before you mount your slide on your microscope stage, take a good look at the morphology of the 48-hour embryo. Note the striking changes in morphology as compare, to the 33-hour embryo. There is a cephalic flexure or bending at the level of the midbrain. The head now lies on its left side. On the other hand dorsal side of the trunk is still turned up so the twisting of the embryo is noticeable. Verify these changes under the low power objective. Note the flexion and the torsion. In addition to the cranial/cephalic flexure there is also a cervical flexure at the level of the neck region. Very briefly go through the structures previously seen in the 33-hour chick. Observe the new structures appearing for the first time (Please visit the main website for viewing the whole mount of 33-hour and 48-hour chick embryo). Ectodermal Derivatives The prosencephalon is now divided into two regions: Telencephalon: This brain region is the anterior…
The 48-hr Chick Embryo Whole Mount (SEE IMAGE) Before you mount your slide on your microscope stage, take a good look at the morphology of the 48-hour embryo. Note the striking changes in morphology as compare, to the 33-hour embryo. There is a cephalic flexure or bending at the level of the midbrain. The head now lies on its left side. On the other hand dorsal side of the trunk is still turned up so the twisting of the embryo is noticeable. Verify these changes under the low power objective. Note the flexion and the torsion. In addition to the cranial/cephalic flexure there is also a cervical flexure at the level of the neck region. Very briefly go through the structures previously seen in the 33-hour chick. Observe the new structures appearing for the first time (Please visit the main website for viewing the whole mount of 33-hour and 48-hour chick embryo). Ectodermal Derivatives The prosencephalon is now divided into two regions: Telencephalon: This brain region is the anterior…
The 48-hr Chick Embryo Whole Mount (SEE IMAGE) Before you mount your slide on your microscope stage, take a good look at the morphology of the 48-hour embryo. Note the striking changes in morphology as compare, to the 33-hour embryo. There is a cephalic flexure or bending at the level of the midbrain. The head now lies on its left side. On the other hand dorsal side of the trunk is still turned up so the twisting of the embryo is noticeable. Verify these changes under the low power objective. Note the flexion and the torsion. In addition to the cranial/cephalic flexure there is also a cervical flexure at the level of the neck region. Very briefly go through the structures previously seen in the 33-hour chick. Observe the new structures appearing for the first time (Please visit the main website for viewing the whole mount of 33-hour and 48-hour chick embryo). Ectodermal Derivatives The prosencephalon is now divided into two regions: Telencephalon: This brain region is the anterior…
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