Unit 5: Heredity

Heredity is the concept of passing genes on from generation to generation. This starts with the creation of gametes, or sex cells, through cellular division called meiosis.

5.0 Unit 5 Overview: Heredity

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57:18

Mendelian and Non-Mendelian Genetics and Chi Square

A look at the genetic theories of Mendel, theories that stray from his, and details into chi-square statistics.

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Mendelian Genetics - Slides

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Browse slides from the stream 'Mendelian and Non-Mendelian Genetics and Chi Square.'

Non-Mendelian Genetics - Slides

Test your knowledge on genetics!

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🏆trivia

Mendelian and Non-Mendelian Genetics with Chi Square Trivia

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51:30

Meiosis and an Intro to Heredity

A detailed overview of meiosis and its contributions to genetic diversity and an intro into heredity.

Feb 6 2020

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Meiosis and an Intro to Heredity - Slides

Feb 6 2020

Browse slides from the stream 'Non-Mendelian Genetics & Pedigrees,' where we cover topics including DNA & Genetics, Cellular Processes, and Reproduction.

Non-Mendelian Genetics & Pedigrees - Slides

Jan 24 2019

51:05

Non-Mendelian Genetics & Pedigrees

In this session, we'll talk about non-Mendelian inheritance patterns, including codominance, incomplete dominance, and sex-linked traits.

Jan 24 2019

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50:00

Chi Square Analysis

In this presentation, we'll spend a lot of time working out Chi Square practice questions. Additionally, we'll discover how it's presented on the AP Biology Exam.

Jan 17 2019

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Browse slides from the stream 'Chi Square Analysis,' where we cover topics including Experimental Design.

Chi Square Analysis - Slides

Jan 17 2019

Browse slides from the stream 'Mendelian Genetics,' where we cover topics including DNA & Genetics, Plants, and Reproduction.

Mendelian Genetics - Slides

Jan 10 2019

50:17

Mendelian Genetics

In this session, we'll examine how Gregor Mendel's work influenced the field of modern genetics and apply his findings to predict the genetic makeup of offspring.

Jan 10 2019

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Meiosis is the process that all organisms go through in order to produce gametes, or sex cells. The process differs from mitosis, the process of somatic cell division, in a number of key ways. Meiosis involves one round of DNA replication and two rounds of cellular division. The resulting cells are all genetically unique from one another and from the parent cell. The resulting cells are also haploid, meaning that they have half of the genetic content of a typical somatic cell, or diploid cell.

5.1 Meiosis

There are a few key concepts within meiosis that contribute to genetic diversity. Remember that diversity is the key to life. When all else fails, focus on diversity in your answers for the AP exam. Some key contributors to genetic diversity in meiosis are the concepts of crossing over, independent assortment, and random fertilization.

5.2 Meiosis and Genetic Diversity

Gregor Mendel, the father of modern genetics, came up with some really important laws, including the law of independent assortment, that allows for scientists to determine how genes are inherited from generation to generation.

5.3 Mendelian Genetics

Most traits actually do not follow Mendel’s laws of dominant and recessive inheritance. The inheritance of these traits is referred to as Non-Mendelian genetics. A few important Non-Mendelian inheritance patterns are multiple alleles, sex-linked traits, incomplete dominance, and codominance.

5.4 Non-Mendelian Genetics

3 min read

Environmental conditions may play a role in which phenotypes are prevalent in a certain environment. This goes back to the concept of natural selection, in which environmental conditions can determine which individuals survive and reproduce more than others.

5.5 Environmental Effects on Phenotype

As described before, chromosomes are inherited from both parents following the rules of genetics. There is an equal chance that either version of a gene may be inherited in offspring due to the law of Independent Assortment. Random fertilization allows for even more variation in that it is simply by chance that a certain egg and a certain sperm combine to form a zygote.

5.6 Chromosomal Inheritance