Name: how alleles shape inherited traits
Uploaded: 2024-08-29T22:13:37.000Z
Duration: 1 min 25 s
Channel: JoVE

K12 Standards

Arizona Science Standards

High School

Life Science

HS+B.L3

HS+B.L3U1.10

Genetic Variation

유전적 변이는 개체 간의 DNA 염기서열 차이에서 비롯되며, 이는 종의 적응과 진화에 필수적입니다.
유전적 변이는 난소가 난자를 생산하고 고환이 감수분열(meiosis)이라는 과정을 통해 정자를 생산할 때 발생합니다.
난소는 난관을 통해 자궁으로 이동하면서 정자와 수정될 수 있는 난자를 방출합니다.
각 난자와 정자는 유전자를 암호화하는 DNA 염기서열인 23개의 염색체를 제공합니다.
대립유전자는 특정 형질에 영향을 미치는 이러한 유전자의 다양한 버전입니다. 예를 들어, 눈 색깔을 결정하는 유전자는 파란색 또는 갈색 눈과 같은 다양한 대립유전자를 가지고 있습니다.
수정은 양쪽 부모의 유전 물질을 결합한 46개의 염색체를 가진 접합자를 낳습니다.
유전자에 대해 두 개의 동일한 대립유전자를 가진 개체를 동형접합적이라고 하며, 두 개의 다른 대립유전자를 가진 개체를 이형접합적이라고 합니다.
예를 들어, 글로빈 유전자의 돌연변이 대립유전자 2개를 가진 개체는 겸상적혈구 빈혈이라는 유전적 질환을 앓게 되는 반면, 건강한 대립유전자 1개와 돌연변이가 있는 대립유전자 1개를 가진 이형접합적 개체는 심각한 질병 증상을 나타내지 않습니다.

유전적 변이

유전적 변이는 같은 종의 개체에서 발견되는 DNA 서열의 다양성입니다. 이 다양성은 생물이 환경 변화에 적응하는 데 도움이 되기 때문에 종의 생존에 필수적입니다. 유전적 변이는 난자와 정자 세포가 합쳐지는 수정으로 시작됩니다. 이 세포 각각은 23개의 염색체를 가지고 있으며, 수정란에는 최대 46개가 있습니다. 염색체는 유전의 기본 단위인 유전자를 포함하는 긴 DNA 가닥입니다.

유전자는 대립유전자라고 하는 다양한 버전으로 존재하며, 머리카락과 눈 색깔 또는 특정 질병의 위험과 같은 다양한 특성에 영향을 미칠 수 있습니다. 두 부모로부터 물려받은 대립유전자의 특정 조합은 자손의 신체적 외모와 건강 특성을 형성하는 독특한 유전적 지시 세트를 생성하며, 이를 표현형이라고 합니다.

유전자형은 두 부모로부터 받은 대립유전자에 의해 결정되는 개인의 특정 유전적 구성입니다. 이 유전적 조합은 특성이 표현되는 방식에 영향을 미칩니다. 예를 들어, 눈 색깔은 각 부모가 기여하는 눈 색깔 대립유전자에 의해 영향을 받습니다. 두 부모 모두 파란 눈에 대한 열성 대립 유전자를 제공하면 자녀는 파란 눈을 가질 가능성이 높습니다. 반대로 한 대립 유전자가 갈색 눈에 대한 것이고 다른 대립 유전자가 파란색 눈에 대한 것이면 일반적으로 우성 갈색 대립 유전자가 우세하여 자녀의 눈이 갈색이 됩니다. 

동형접합체와 이형접합체라는 용어는 특정 유전자의 두 대립 유전자가 같은지 다른지 설명합니다. 동형접합체는 두 대립 유전자가 동일하다는 것을 의미하고, 이형접합체는 두 대립 유전자가 다르다는 것을 의미합니다. 이러한 구별은 개인의 건강에 상당한 영향을 미칠 수 있습니다. 예를 들어, 겸상 적혈구 빈혈은 헤모글로빈 유전자에 대한 두 개의 열성 대립 유전자를 가진 개인이 이 질병을 앓는 상태입니다. 그러나 정상 적혈구 유전자 하나와 낫적혈구 유전자 하나를 가진 이형접합자의 경우, 질병의 증상은 나타나지 않지만 말라리아에 대해 보호적 이점이 있어 말라리아가 흔한 지역에서 유익합니다.

유전적 변이는 개체 간의 DNA 염기서열 차이에서 비롯되며, 이는 종의 적응과 진화에 필수적입니다.
유전적 변이 ...

Education

교육

JoVE Core

Introduction to Psychology

심리학 개론

Unit 1

제1단원

Biopsychology

생물심리학

KEY TERMS AND CONCEPTS

주요 용어 및 개념

how alleles shape inherited traits

Genetic variation helps explain why individuals in the same species can look and act differently. It comes from differences in DNA sequences. This diversity matters because it helps a species survive and adapt when the environment changes.

Variation starts at fertilization, when an egg and sperm cell join. Each of these cells carries 23 chromosomes, so the fertilized egg can have up to 46 chromosomes. Chromosomes are long DNA strands that contain genes, which are the basic units of heredity.

Genes can appear in different versions called alleles. These alleles can affect traits such as hair and eye color. They can also influence the risk of certain diseases. The combination of alleles inherited from both parents creates a unique set of genetic instructions. These instructions shape an offspring’s physical appearance and health traits, which are called the phenotype.

An individual’s genotype is the specific genetic makeup they inherit from both parents. Genotype affects how traits are expressed. For example, eye color depends on the alleles each parent contributes. If both parents pass on a recessive allele for blue eyes, the child is likely to have blue eyes. If one allele is for brown eyes and the other is for blue eyes, the dominant brown allele usually leads to brown eyes.

The terms homozygous and heterozygous describe whether the two alleles for a gene are the same or different. Homozygous means both alleles are identical. Heterozygous means the alleles are different. This difference can affect health. People with two recessive alleles for the hemoglobin gene can have sickle cell anemia. People with one normal allele and one sickle cell allele do not show symptoms, but they have a protective advantage against malaria. This advantage is helpful in areas where malaria is common.

How Alleles Shape Inherited Traits

introduction to biological bases of psychology

introduction-to-biological-bases-of-psychology

Biological Factors Shaping Behavior and Mind

Biopsychology connects biology and psychology by showing how the body influences behavior and mental processes. It focuses on the nervous system, neurotransmitters, hormones, genetics, and evolutionary ideas. Together, these areas help explain why people think, feel, and act the way they do. The nervous system is the main foundation of biopsychology. It has two parts: the central nervous system, or CNS, and the peripheral nervous system, or PNS. The CNS includes the brain and spinal cord and...

nervous system

Nervous System: CNS, PNS, and Reflexes

The nervous system helps the body sense, move, and respond. It works through a network of nerve cells that carry signals around the body. This system has two main parts: the central nervous system and the peripheral nervous system. The central nervous system, or CNS, includes the brain and spinal cord. The brain acts as the body’s control center. It processes sensory information and helps coordinate responses. The spinal cord serves as a major pathway for signals between the brain and the rest...

neurons as communicators of the brain

Neuron Parts and Signal Transmission

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cerebral hemispheres

How the Brain’s Two Halves Work

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Spinal Cord Nerves and Reflexes

The spinal cord is a major part of the central nervous system. It runs from the base of the brainstem to the lumbar region of the vertebral column. It helps keep the body stable and carries signals between the brain and the rest of the body. The spinal cord sits inside the bony spine for protection. It is divided into 30 segments that match the vertebrae. Each segment connects to a specific body region through paired spinal nerves. These spinal nerves are grouped by where they leave the...

lateralization

Brain Hemisphere Specialization

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genetic variation

Genetic variation helps explain why individuals in the same species can look and act differently. It comes from differences in DNA sequences. This diversity matters because it helps a species survive and adapt when the environment changes. Variation starts at fertilization, when an egg and sperm cell join. Each of these cells carries 23 chromosomes, so the fertilized egg can have up to 46 chromosomes. Chromosomes are long DNA strands that contain genes, which are the basic units of heredity. <br...

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inheritance

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heritability

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key terms and concepts

Learn how alleles, genotype, and phenotype work together to shape inherited traits, from eye color to sickle cell anemia and malaria protection.

How Alleles Shape Inherited Traits | JoVE K12

JoVE Core Introduction to Psychology offers an engaging learning experience on the fundamental principles of psychology through concise video lessons. Students will explore important topics such as cognitive processes, emotional regulation, and neural mechanisms, establishing a strong foundation in the study of the mind and human behavior. This series provides an accessible and captivating approach to grasp the essential concepts of the discipline.

introduction to psychology

Next Generation Science Standards

heredity-inheritance-and-variation-of-traits

Heredity: Inheritance and Variation of Traits

HS-LS3-2

Florida Department of Education

SC.912.L.15

SC.912.L.15.15

SC.912.L.16

SC.912.L.16.17

new-york-state-science-learning-standards

New York State Science Learning Standards

Inheritance and Variation of Traits

HS-LS3-1.

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Mutation, Gene Flow, and Genetic Drift

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Genetic variation stems from differences in DNA sequences among individuals, which are essential for species adaptation and evolution.
Genetic variations ...

Heritability

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Heritability can vary depending on the ...

Natural Selection and Adaptation

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Natural Selection and Mating Preferences

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Evolutionary ...

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The DNA Helix

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DNA Packaging

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Organization of Genes

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Karyotyping

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RNA Structure

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Bacterial Transformation

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What is Gene Expression?

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The Central Dogma

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Transcription Factors

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Construct an explanation for how the structure of DNA and RNA determine the structure of proteins that perform essential life functions.

HS+B.L3U1.11

Mutations

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Evolutionary Relationships through Genome Comparisons

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Multi-species Conserved Sequences

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Gene Duplication and Divergence

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Exon Recombination

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Analyze and interpret data on how mutations can lead to increased genetic variation in a population.

HS+B.L3U1.12

How Alleles Shape Inherited Traits

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