During the development of an animal embryo, different tissue types like muscle and neurons will begin to form as the result of:     cells changing from diploid to haploid because of meiosis     segregation of specific chromosomes to daughter cells     synthesis of messenger RNAs from different sets of genes     mutations occurring that randomly activate genes for specific tissues     crossing over forcing the expression of particular genes

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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During the development of an animal embryo, different tissue types like muscle and neurons will begin to form as the result of:

   

cells changing from diploid to haploid because of meiosis

   

segregation of specific chromosomes to daughter cells

   

synthesis of messenger RNAs from different sets of genes

   

mutations occurring that randomly activate genes for specific tissues

   

crossing over forcing the expression of particular genes

### Pedigree Analysis of Chromosome 17 Polymorphisms

A pedigree is presented showcasing the individual results of 23andMe ancestry analysis for chromosome 17. These results illustrate three different polymorphism patterns, represented by three distinct color codes: white, black, and gray. The pedigree diagram displays two parents at the top, and their three children at the bottom.

#### Diagram Description:
1. **Parents:**
   - The father (depicted with a square) shows one chromosome with white and gray pattern and the other chromosome with a white and black pattern.
   - The mother (depicted with a circle) shows one chromosome with black pattern and the other chromosome with black and white pattern.

2. **Children:**
   - **Child 1:** Shows one chromosome with white and gray pattern and the other chromosome with white and black pattern.
   - **Child 2:** Shows one chromosome with white and gray pattern and the other chromosome with black and gray pattern.
   - **Child 3:** Shows one chromosome with white and black pattern and the other chromosome with black and gray pattern.

#### Question:
- **"Assuming normal rules of inheritance, which of the children show(s) an inheritance pattern that is NOT possible?"**

#### Explanation:
By analyzing the inheritance patterns, we can determine if the chromosomal combinations for each child are genetically viable based on the chromosomes provided by the parents.

Options provided:
- 1
- 1,2,3
- 1,2
- 1,3
- 2,3
- 3
- 2
- none

**Choose the correct option based on the analysis:** 

Understanding the basic principles of genetic inheritance (Mendelian inheritance rules, including dominant and recessive traits for chromosome inheritance), the detailed analysis of the children's chromosome combinations will determine which child's inheritance pattern is impossible based on the parental chromosomes.

#### Conclusion:
The question prompts assessing the children's potential chromosome combinations to identify any anomalies in inheritance patterns that do not align with Mendelian principles based on the genetic information of the parents.
Transcribed Image Text:### Pedigree Analysis of Chromosome 17 Polymorphisms A pedigree is presented showcasing the individual results of 23andMe ancestry analysis for chromosome 17. These results illustrate three different polymorphism patterns, represented by three distinct color codes: white, black, and gray. The pedigree diagram displays two parents at the top, and their three children at the bottom. #### Diagram Description: 1. **Parents:** - The father (depicted with a square) shows one chromosome with white and gray pattern and the other chromosome with a white and black pattern. - The mother (depicted with a circle) shows one chromosome with black pattern and the other chromosome with black and white pattern. 2. **Children:** - **Child 1:** Shows one chromosome with white and gray pattern and the other chromosome with white and black pattern. - **Child 2:** Shows one chromosome with white and gray pattern and the other chromosome with black and gray pattern. - **Child 3:** Shows one chromosome with white and black pattern and the other chromosome with black and gray pattern. #### Question: - **"Assuming normal rules of inheritance, which of the children show(s) an inheritance pattern that is NOT possible?"** #### Explanation: By analyzing the inheritance patterns, we can determine if the chromosomal combinations for each child are genetically viable based on the chromosomes provided by the parents. Options provided: - 1 - 1,2,3 - 1,2 - 1,3 - 2,3 - 3 - 2 - none **Choose the correct option based on the analysis:** Understanding the basic principles of genetic inheritance (Mendelian inheritance rules, including dominant and recessive traits for chromosome inheritance), the detailed analysis of the children's chromosome combinations will determine which child's inheritance pattern is impossible based on the parental chromosomes. #### Conclusion: The question prompts assessing the children's potential chromosome combinations to identify any anomalies in inheritance patterns that do not align with Mendelian principles based on the genetic information of the parents.
### Understanding the Electron Transport Chain

#### Overview
Shown below is a simplified diagram of an electron transport chain (ETC) in a plant cell. This process is vital for both cellular respiration (CR) and photosynthesis (PS).

#### Diagram Explanation

![Electron Transport Chain Diagram](image_link) <!-- Replace with actual image link -->

- The diagram depicts a double-layered structure representing the inner membrane space of mitochondria or the thylakoid membrane in chloroplasts.
- Protons (H⁺) are shown being pumped from side X to side Y, indicated by the large arrow in the center. 

#### Proton Movement and Electron Transport
- **Side X and Side Y:** Represent the different sides of the membrane where protons accumulate and are pumped across.
- **Protons (H⁺):** Illustrated as circles with a plus sign, these are being actively transported across the membrane.
- **Large Arrow:** Symbolizes the direction of proton pumping.

#### Multiple-Choice Question
Which of the following could be correct about this ETC in either cellular respiration (CR) and/or photosynthesis (PS)?

1. ⭘ In CR, side X is the mitochondrial inter-membrane space.
2. ⭘ In PS, NADPH supplies the electrons that enter the chain.
3. ⭘ In CR, the electrons come to the chain from reactions of the citric acid cycle.
4. ⭘ In both PS and CR, the protons travel by facilitated diffusion.
5. ⭘ In PS, the electrons go immediately onto oxygen to make water.

#### Answer Key
- **Option 1:** In cellular respiration (CR), side X indeed could be the mitochondrial inter-membrane space.
- **Option 2:** In photosynthesis (PS), NADPH does not supply the electrons for the ETC; it acts as a product of the light-dependent reactions.
- **Option 3:** Correct. In CR, electrons do originate from the citric acid cycle.
- **Option 4:** Incorrect. Protons are actively transported, not by facilitated diffusion.
- **Option 5:** Incorrect. In PS, electrons do not go onto oxygen; this is specific to CR where oxygen acts as the final electron acceptor to form water.

By understanding the flow of protons and electrons within the electron transport chain, this diagram and the accompanying question help illustrate essential processes in both cellular respiration and photosynthesis.
Transcribed Image Text:### Understanding the Electron Transport Chain #### Overview Shown below is a simplified diagram of an electron transport chain (ETC) in a plant cell. This process is vital for both cellular respiration (CR) and photosynthesis (PS). #### Diagram Explanation ![Electron Transport Chain Diagram](image_link) <!-- Replace with actual image link --> - The diagram depicts a double-layered structure representing the inner membrane space of mitochondria or the thylakoid membrane in chloroplasts. - Protons (H⁺) are shown being pumped from side X to side Y, indicated by the large arrow in the center. #### Proton Movement and Electron Transport - **Side X and Side Y:** Represent the different sides of the membrane where protons accumulate and are pumped across. - **Protons (H⁺):** Illustrated as circles with a plus sign, these are being actively transported across the membrane. - **Large Arrow:** Symbolizes the direction of proton pumping. #### Multiple-Choice Question Which of the following could be correct about this ETC in either cellular respiration (CR) and/or photosynthesis (PS)? 1. ⭘ In CR, side X is the mitochondrial inter-membrane space. 2. ⭘ In PS, NADPH supplies the electrons that enter the chain. 3. ⭘ In CR, the electrons come to the chain from reactions of the citric acid cycle. 4. ⭘ In both PS and CR, the protons travel by facilitated diffusion. 5. ⭘ In PS, the electrons go immediately onto oxygen to make water. #### Answer Key - **Option 1:** In cellular respiration (CR), side X indeed could be the mitochondrial inter-membrane space. - **Option 2:** In photosynthesis (PS), NADPH does not supply the electrons for the ETC; it acts as a product of the light-dependent reactions. - **Option 3:** Correct. In CR, electrons do originate from the citric acid cycle. - **Option 4:** Incorrect. Protons are actively transported, not by facilitated diffusion. - **Option 5:** Incorrect. In PS, electrons do not go onto oxygen; this is specific to CR where oxygen acts as the final electron acceptor to form water. By understanding the flow of protons and electrons within the electron transport chain, this diagram and the accompanying question help illustrate essential processes in both cellular respiration and photosynthesis.
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Development of an animal embryo starts with the process of fertilization of egg cell by a sperm cell. After the fertilization zygote undergoes the mitotic cell divisions and cellular differentiation that lead to the development of a multicellular animal embryo. The developing embryo is known as blastula. The dramatic rearrangement of the cells in blastula to create the embryonic tissue layers is known as gastrulation. These tissue layers later produce the tissues and organs of the animal.

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