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It is evident that the greatest number of different mitochondrial DNA sequences occur among modern Africans. This evidence favors that
- a)Homo-sapiens evolved somewhere out of Africa, and they migrated to Africa.
- b)Homo -sapiens evolved in Africa, and from there they migrated outside Africa.
- c)Homo -sapiens were present all over the world, but in Africa they live for longest duration
- d)Two different groups of Homo-Sapiens evolved parallelly, one in Africa, and one outside Africa.
Correct answer is option 'B'. Can you explain this answer?
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It is evident that the greatest number of different mitochondrial DNA ...
Obviously B, Homosapiens arose in Africa and migrated to other parts of world..
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It is evident that the greatest number of different mitochondrial DNA ...
Introduction:
The question discusses the evidence regarding the diversity of mitochondrial DNA (mtDNA) sequences among modern humans and its implications for the origin and migration of Homo sapiens. The correct answer is option 'B' which states that Homo sapiens evolved in Africa and then migrated outside.
Evidence of greatest mtDNA diversity in modern Africans:
1. Analysis of mtDNA sequences: Mitochondrial DNA is inherited solely from the mother, making it an effective tool for studying human evolutionary history. Studies analyzing mtDNA sequences from different populations have consistently shown that the greatest diversity of mtDNA sequences is found among modern Africans.
2. Coalescent theory: Coalescent theory, a mathematical model used to understand the genealogy of populations, suggests that the most recent common ancestor (MRCA) of all modern humans lived in Africa. The high diversity of mtDNA sequences in Africa supports the idea that the MRCA was an African individual.
3. Genetic drift and founder effect: Genetic drift and founder effect are mechanisms that can lead to the loss of genetic diversity in populations. As humans migrated out of Africa and established new populations, they went through genetic bottlenecks and experienced reduced genetic diversity. This would result in a decrease in the number of mtDNA lineages outside of Africa, explaining the lower diversity observed in non-African populations.
Implications:
1. Out of Africa theory: The evidence of the greatest mtDNA diversity in modern Africans supports the Out of Africa theory, which suggests that Homo sapiens originated in Africa and then migrated to other parts of the world. This migration event is believed to have occurred approximately 70,000-100,000 years ago.
2. Replacement of archaic humans: The Out of Africa theory also proposes that Homo sapiens replaced or assimilated archaic human populations, such as Neanderthals and Denisovans, as they expanded out of Africa. The higher mtDNA diversity in modern Africans suggests that they are more closely related to the original Homo sapiens population that migrated out of Africa.
3. Subsequent migrations: While the initial migration out of Africa is supported by the high mtDNA diversity in modern Africans, subsequent migrations and population movements have also occurred. These migrations have contributed to the genetic diversity observed in non-African populations today.
Conclusion:
Based on the evidence of the greatest mtDNA diversity among modern Africans, it can be concluded that Homo sapiens evolved in Africa and then migrated to other parts of the world. This supports the Out of Africa theory and suggests that the genetic diversity observed in modern humans is a result of subsequent migrations and population movements.
The question discusses the evidence regarding the diversity of mitochondrial DNA (mtDNA) sequences among modern humans and its implications for the origin and migration of Homo sapiens. The correct answer is option 'B' which states that Homo sapiens evolved in Africa and then migrated outside.
Evidence of greatest mtDNA diversity in modern Africans:
1. Analysis of mtDNA sequences: Mitochondrial DNA is inherited solely from the mother, making it an effective tool for studying human evolutionary history. Studies analyzing mtDNA sequences from different populations have consistently shown that the greatest diversity of mtDNA sequences is found among modern Africans.
2. Coalescent theory: Coalescent theory, a mathematical model used to understand the genealogy of populations, suggests that the most recent common ancestor (MRCA) of all modern humans lived in Africa. The high diversity of mtDNA sequences in Africa supports the idea that the MRCA was an African individual.
3. Genetic drift and founder effect: Genetic drift and founder effect are mechanisms that can lead to the loss of genetic diversity in populations. As humans migrated out of Africa and established new populations, they went through genetic bottlenecks and experienced reduced genetic diversity. This would result in a decrease in the number of mtDNA lineages outside of Africa, explaining the lower diversity observed in non-African populations.
Implications:
1. Out of Africa theory: The evidence of the greatest mtDNA diversity in modern Africans supports the Out of Africa theory, which suggests that Homo sapiens originated in Africa and then migrated to other parts of the world. This migration event is believed to have occurred approximately 70,000-100,000 years ago.
2. Replacement of archaic humans: The Out of Africa theory also proposes that Homo sapiens replaced or assimilated archaic human populations, such as Neanderthals and Denisovans, as they expanded out of Africa. The higher mtDNA diversity in modern Africans suggests that they are more closely related to the original Homo sapiens population that migrated out of Africa.
3. Subsequent migrations: While the initial migration out of Africa is supported by the high mtDNA diversity in modern Africans, subsequent migrations and population movements have also occurred. These migrations have contributed to the genetic diversity observed in non-African populations today.
Conclusion:
Based on the evidence of the greatest mtDNA diversity among modern Africans, it can be concluded that Homo sapiens evolved in Africa and then migrated to other parts of the world. This supports the Out of Africa theory and suggests that the genetic diversity observed in modern humans is a result of subsequent migrations and population movements.
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It is evident that the greatest number of different mitochondrial DNA sequences occur among modern Africans. This evidence favors thata)Homo-sapiens evolved somewhere out of Africa, and they migrated to Africa. b)Homo -sapiens evolved in Africa, and from there they migrated outside Africa. c)Homo -sapiens were present all over the world, but in Africa they live for longest duration d)Two different groups of Homo-Sapiens evolved parallelly, one in Africa, and one outside Africa.Correct answer is option 'B'. Can you explain this answer?
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It is evident that the greatest number of different mitochondrial DNA sequences occur among modern Africans. This evidence favors thata)Homo-sapiens evolved somewhere out of Africa, and they migrated to Africa. b)Homo -sapiens evolved in Africa, and from there they migrated outside Africa. c)Homo -sapiens were present all over the world, but in Africa they live for longest duration d)Two different groups of Homo-Sapiens evolved parallelly, one in Africa, and one outside Africa.Correct answer is option 'B'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about It is evident that the greatest number of different mitochondrial DNA sequences occur among modern Africans. This evidence favors thata)Homo-sapiens evolved somewhere out of Africa, and they migrated to Africa. b)Homo -sapiens evolved in Africa, and from there they migrated outside Africa. c)Homo -sapiens were present all over the world, but in Africa they live for longest duration d)Two different groups of Homo-Sapiens evolved parallelly, one in Africa, and one outside Africa.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for It is evident that the greatest number of different mitochondrial DNA sequences occur among modern Africans. This evidence favors thata)Homo-sapiens evolved somewhere out of Africa, and they migrated to Africa. b)Homo -sapiens evolved in Africa, and from there they migrated outside Africa. c)Homo -sapiens were present all over the world, but in Africa they live for longest duration d)Two different groups of Homo-Sapiens evolved parallelly, one in Africa, and one outside Africa.Correct answer is option 'B'. Can you explain this answer?.
It is evident that the greatest number of different mitochondrial DNA sequences occur among modern Africans. This evidence favors thata)Homo-sapiens evolved somewhere out of Africa, and they migrated to Africa. b)Homo -sapiens evolved in Africa, and from there they migrated outside Africa. c)Homo -sapiens were present all over the world, but in Africa they live for longest duration d)Two different groups of Homo-Sapiens evolved parallelly, one in Africa, and one outside Africa.Correct answer is option 'B'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about It is evident that the greatest number of different mitochondrial DNA sequences occur among modern Africans. This evidence favors thata)Homo-sapiens evolved somewhere out of Africa, and they migrated to Africa. b)Homo -sapiens evolved in Africa, and from there they migrated outside Africa. c)Homo -sapiens were present all over the world, but in Africa they live for longest duration d)Two different groups of Homo-Sapiens evolved parallelly, one in Africa, and one outside Africa.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for It is evident that the greatest number of different mitochondrial DNA sequences occur among modern Africans. This evidence favors thata)Homo-sapiens evolved somewhere out of Africa, and they migrated to Africa. b)Homo -sapiens evolved in Africa, and from there they migrated outside Africa. c)Homo -sapiens were present all over the world, but in Africa they live for longest duration d)Two different groups of Homo-Sapiens evolved parallelly, one in Africa, and one outside Africa.Correct answer is option 'B'. Can you explain this answer?.
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