Human Heredity: Principles and Issues (MindTap Course List)
11th Edition
ISBN: 9781305251052
Author: Michael Cummings
Publisher: Cengage Learning
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Chapter 7, Problem 4QP
A Survey of Human Development from Fertilization to Birth
4. The gestation of a fetus occurs over 9 months and is divided into three trimesters. Describe the major events that occur in each trimester. Is there a point at which the fetus becomes more “human”?
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SOME EVENTS IN THE PROCESS OF FERTILIZATION
1. A single sperm nucleus and an egg nucleus fuse to form a zygote.
2. Many sperm cells travel a path through the outer layer of the egg cell.
3. The egg's plasma membrane is penetrated by a sperm cell.
4. A rapid depolarization of the egg plasma membrane occurs.
The correct sequence to complete the fertilization of the egg is
,
,
and
Human Development and Birth
1. Where does the process of gastrulation occur?
2. What structure, located under the placenta, is responsible for oxygen and nutrient acquisition for the developing human?
Trimester
Milestone
First
Second
Grow
Grow +Lungs
Chapter 7 Solutions
Human Heredity: Principles and Issues (MindTap Course List)
Ch. 7.6 - Prob. 1EGCh. 7.6 - Prob. 2EGCh. 7 - As outlined in this chapter, sex can be defined at...Ch. 7 - As outlined in this chapter, sex can be defined at...Ch. 7 - Prob. 1QPCh. 7 - The Human Reproductive System Discuss and compare...Ch. 7 - Prob. 3QPCh. 7 - A Survey of Human Development from Fertilization...Ch. 7 - Prob. 5QPCh. 7 - Prob. 6QP
Ch. 7 - Prob. 7QPCh. 7 - How Is Sex Determined? The absence of a Y...Ch. 7 - Prob. 9QPCh. 7 - Mutations Can Uncouple Chromosomal Sex from...Ch. 7 - Prob. 11QPCh. 7 - Mutations Can Uncouple chromosomal Sex from...Ch. 7 - Prob. 13QPCh. 7 - Sex-Influenced and Sex-Limited Traits What method...Ch. 7 - Prob. 15QPCh. 7 - Prob. 16QPCh. 7 - Equalizing the Expression of X Chromosome Genes in...Ch. 7 - Equalizing the Expression of X Chromosome Genes in...Ch. 7 - Equalizing the Expression of X Chromosome Genes in...
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- Major organs begin to develop during which part of human gestation? fertilization first trimester second trimester third trimesterarrow_forwardThe placenta is formed from ________. the embryos mesenchymal cells the mothers endometrium only the mothers endometrium and the embryos chorionic membrane the mothers endometrium and the embryos umbilical cordarrow_forwardNutrient and waste requirements for the developing fetus are handled during the first few weeks by: the placenta diffusion through the endometrium the chorion the blastocystarrow_forward
- What would happen if the trophoblast did not secrete hCG upon implantation of the blastocyst? Tire cells would not continue to divide. Tire corpus luteum would continue to produce progesterone and estrogen. Menses would flush the blastocyst out of the uterus. Tire uterine mucosa would not envelop the blastocyst.arrow_forwardTrophoblast or ICM? If cells choose to become trophoblast, they will end up in the placenta. If they choose to become ICM, they will give rise to the 3 germ layers that will make up the rest of the body of the embryo. Answer the following questions: What will guide them to make the right decision? Do they have a choice?arrow_forwardDescribe the features and process of a fetus embryo at 10 weeks of pregnancy.arrow_forward
- Vertebrate Fertilized Class Blastula or Blastocyst Late Morula Gastrula Egg Embryo Amphibian Reptile Mammal How long after ovulation does it take an embryo to develop? The resulting embryo may become the (attached) in the lining of After eight weeks of development the embryo is called the How long does it takes the fetus to develop and grow inside the mother? What is differentiation? The embryo continues dividing and form all the tissues organs and organ systems of the animal When should pregnant mother take most precaution?arrow_forwardState and explain 5 effects of tobacco smoking by a pregnant mother on the foetus development. (400 words) Identify and explain 5 disadvantages of In vitro fertilisation (IVF) as an intervention to have a baby. (400 words) Why is breast feeding in the first 3month of a baby very important? (200 words) Higher animals undergo sexual reproduction despite its complexity, why. Give 5 reasons. (400 words) Describe five changes that occur in a flower after fertilisation. (200 words)arrow_forwardThe 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…arrow_forward
- 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…arrow_forwardThe 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…arrow_forwardThe 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…arrow_forward
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Reproduction: Crash Course Zoology #9; Author: CrashCourse;https://www.youtube.com/watch?v=poLyJDVjKlM;License: Standard youtube license