the modern evolutionary synthesis of the 1930s and 1940s melded together darwins findings with c

Name: the modern evolutionary synthesis of the 1930s and 1940s melded together darwins findings with chemistry genetics psychology sociology 70483
Uploaded: 2022-09-20T17:06:05-08:00
Duration: 1 min 44 s
Channel: Lainey Roebuck
Description: the modern evolutionary synthesis of the 1930s and 1940s melded together darwins findings with chemistry genetics psychology sociology 70483

Step 1: The modern evolutionary synthesis of the 1930s and 1940s combined Darwin's theory of nat

The modern evolutionary synthesis of the 1930s and 1940s...

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The Modern Synthesis resulted primarily from the reconciliation of genetics with Darwinian evolution the discovery that evolution was occurring even today evidence that natural selection was the main cause of evolution the reconciliation of Darwinian evolution with Linnean taxonomy

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Describe the modern theory of evolution and discuss how it is supported by evidence from two of the following three areas. Population genetics Molecular biology Comparative anatomy and embryology.

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Describe Darwin's four postulates as they were originally proposed and after they were modified to reflect insights from Mendelian and modern genetics. Darwin's four postulates, originally proposed in his book "On the Origin of Species," form the foundation of his theory of evolution by natural selection. These postulates were later modified to incorporate the discoveries and principles of Mendelian and modern genetics. The first postulate states that individuals within a population exhibit variation. This variation can be attributed to genetic differences, which arise through processes such as mutation and recombination. These genetic variations can result in differences in physical traits, behavior, and other characteristics among individuals within a population. The second postulate suggests that some of these variations are heritable. This means that the genetic differences can be passed on from one generation to the next. Mendelian genetics, discovered by Gregor Mendel, provided the framework to understand how traits are inherited through the transmission of genes from parents to offspring. The third postulate proposes that there is a struggle for existence within populations. This struggle arises due to limited resources and the competition for survival and reproduction. Individuals with advantageous traits that increase their chances of survival and reproduction are more likely to pass on their genes to the next generation. This concept aligns with the principles of natural selection, where individuals with favorable traits have a higher fitness and are more likely to contribute their genes to future generations. The fourth postulate states that over time, favorable traits accumulate in a population, leading to the evolution of new species. This accumulation occurs through the process of natural selection, where individuals with advantageous traits have a higher chance of survival and reproduction, passing on their genes to subsequent generations. Over many generations, these accumulated changes can result in the formation of new species. After the integration of Mendelian and modern genetics, Darwin's postulates were modified to incorporate the understanding of how genes are inherited and how genetic variations contribute to evolution. The principles of Mendelian genetics provided a mechanism to explain how traits are passed on from one generation to the next, while modern genetics expanded our knowledge of the molecular basis of inheritance and the role of DNA in genetic variation. The modified postulates now recognize that genetic variations arise through processes such as mutation, recombination, and genetic drift. They also acknowledge the role of gene flow, where genetic material can be exchanged between populations, influencing the genetic diversity within and between species. In summary, Darwin's four postulates, originally proposed and later modified to incorporate insights from Mendelian and modern genetics, provide a comprehensive framework for understanding the process of evolution by natural selection. These postulates highlight the importance of genetic variation, heritability, competition for resources, and the accumulation of favorable traits over time in shaping the diversity of life on Earth.

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Transcript

00:02 So this post, we need to define modern synthesis before we do anything.

00:14 So modern synthesis describes the fusion of mendelian genetics with darwin or darwinian evolution that resulted in a unified theory.

01:02 Of evolution.

01:08 So we have a, b, c, and d.

01:15 And based on this definition alone, we can go ahead and mark off b and c because it does not mention darwin...

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The modern evolutionary synthesis of the 1930s and 1940s melded together Darwin's findings with chemistry genetics psychology sociology

Question

The modern evolutionary synthesis of the 1930s and 1940s melded together Darwin's findings with chemistry genetics psychology sociology

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