Ch. 20 - Population Genetics and Evolution at the Population, Species, and Molecular Levels

Sanders - Genetic Analysis: An Integrated Approach 3rd Edition

Sanders3rd EditionGenetic Analysis: An Integrated ApproachISBN: 9780135564172당신이 사용하는 게 아니라요?교과서 변경

Sanders 3rd Edition

Ch. 20 - Population Genetics and Evolution at the Population, Species, and Molecular Levels

문제 36b

20장, 문제 36b

Draw a separate hypothetical pedigree identifying the inbred individuals and the inbreeding pathways for each of the following inbreeding coefficients:
F=2(1/2)⁵

검증된 단계별 안내

Step 1: Understand the concept of inbreeding coefficient (F). The inbreeding coefficient quantifies the probability that an individual has inherited two alleles that are identical by descent from a common ancestor. In this case, F = 2(1/2)⁵ represents the calculation for a specific inbreeding scenario.

Step 2: Break down the formula F = 2(1/2)⁵. The term (1/2)⁵ represents the probability of alleles being passed down through five generations, and the factor of 2 accounts for the two pathways through which alleles can be inherited from a common ancestor.

Step 3: Draw a hypothetical pedigree. Start by identifying the common ancestor at the top of the pedigree. Then, trace two separate pathways through five generations to the inbred individual. Ensure that the individual at the bottom of the pedigree is connected to the common ancestor through both pathways.

Step 4: Label the inbred individual and the pathways. Clearly mark the individual with the inbreeding coefficient F and highlight the two pathways leading to this individual. Use arrows or lines to show the generational connections.

Step 5: Verify the pedigree structure. Ensure that the pedigree accurately reflects the calculation of F = 2(1/2)⁵, with two distinct pathways and five generations leading to the inbred individual. Double-check that the common ancestor is correctly positioned and connected.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.

영상 길이:

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주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Inbreeding Coefficient (F)

The inbreeding coefficient (F) quantifies the probability that two alleles at a locus are identical by descent. It ranges from 0 (no inbreeding) to 1 (complete inbreeding). In this context, F=2(1/2)⁵ indicates a specific level of inbreeding, which can be calculated based on the number of generations and the relatedness of the individuals involved.

Pedigree Analysis

Pedigree analysis is a method used to trace the inheritance of traits through generations in a family tree format. It helps identify relationships between individuals, including inbred individuals, by illustrating how traits are passed down. Understanding how to construct and interpret pedigrees is essential for visualizing inbreeding pathways and calculating inbreeding coefficients.

Inbreeding Pathways

Inbreeding pathways refer to the specific routes through which genetic material is passed between related individuals, leading to inbreeding. These pathways can be traced in a pedigree to identify how closely related individuals contribute to the genetic makeup of offspring. Recognizing these pathways is crucial for understanding the implications of inbreeding on genetic diversity and potential health issues in a population.

관련 실천

교과서 질문

Draw a separate hypothetical pedigree identifying the inbred individuals and the inbreeding pathways for each of the following inbreeding coefficients:

F=2(1/2)⁷

406

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교과서 질문

Draw a separate hypothetical pedigree identifying the inbred individuals and the inbreeding pathways for each of the following inbreeding coefficients:

F=4(1/2)⁸

427

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교과서 질문

Evaluate the following pedigree, and answer the questions below. Calculate F for any inbred members of this family.

428

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교과서 질문

Draw a separate hypothetical pedigree identifying the inbred individuals and the inbreeding pathways for each of the following inbreeding coefficients:

F=4(1/2)⁶

425

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교과서 질문

The human melanocortin 1 receptor gene (MC1R) plays a major role in producing eumelanin, a black-brown pigment that helps determine hair color and skin color. Jonathan Rees and several colleagues (J. L. Rees et al., Am. J. Human Genet. 66(2000): 1351–1361) studied multiple MC1R alleles in African and European populations. Although this research found several MC1R alleles in African populations, MC1R alleles that decrease the production of eumelanin were rare. In contrast, several alleles decreasing eumelanin production were found in European populations. How can these results be explained by natural selection?

666

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교과서 질문

The following is a partial pedigree of the British royal family. The family contains several inbred individuals and a number of inbreeding pathways. Carefully evaluate the pedigree, and identify the pathways and common ancestors that produce inbred individuals A (Alice in generation IV), B (George VI in generation VI), and C (Charles in generation VIII).

631

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Draw a separate hypothetical pedigree identifying the inbred individuals and the inbreeding pathways for each of the following inbreeding coefficients:F=2(1/2)⁵

비슷한 문제에 대한 검증된 영상 답변:

주요 개념

Inbreeding Coefficient (F)

Pedigree Analysis

Inbreeding Pathways

Draw a separate hypothetical pedigree identifying the inbred individuals and the inbreeding pathways for each of the following inbreeding coefficients:
F=2(1/2)⁵