"Heredity and Environment" PPT

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"Heredity and Environment" PPT

Part One: Learning Objectives

1. Give examples to illustrate the relationship between genotype, phenotype and environment, and distinguish heritable variation from non-heritable variation.

2. Cultivate the ability to analyze problems, experimental design capabilities, data analysis capabilities, and the ability to develop cooperation and inquiry learning.

3. Through the application of heritable variation in breeding, understand the broad application prospects of biology, stimulate enthusiasm for learning life sciences, and develop a scientific attitude that is willing to explore the mysteries of life and seek truth from facts.

Review import

What is genotype?

Tip: Genotype refers to the genetic makeup of an individual organism.

What is a phenotype?

Tip: Phenotype refers to a specific trait expression of an individual organism.

Why do tomatoes and cucumbers have different phenotypes?

Because tomatoes and cucumbers have different genotypes.

Heredity and environment PPT, part 2 content: course exploration

Explore theme one

The relationship between genotype, phenotype and environment

1. Changes in general environmental conditions do not easily change the genotype; the phenotype is easily affected by environmental conditions.

1. The genotype is often relatively stable and determines the phenotype; the phenotype is easily affected by the environment.

2. Phenotype is the result of the interaction between genotype and environmental conditions.

Explore theme two

The relationship between biological variation and the environment

Variation types are divided into heritable variation and non-heritable variation.

1. Heritable variation: Any variation in a trait that can be repeated in future generations. For example, high-yield lodging-resistant wheat and low-yield lodging-resistant wheat are hybridized to produce high-yield lodging-resistant wheat.

2. Non-heritable variation: Variation that does not involve changes in genetic material and is only caused by environmental conditions. For example, corn grows differently in different environments.

Heredity and Environment PPT, Part 3: Class Summary

1. The genotype is relatively stable, and the phenotype is easily affected by the environment. The phenotype is the result of the interaction between the genotype and environmental conditions.

2. The environment can cause both heritable and non-heritable mutations. Only mutations that cause changes in genetic material are heritable mutations.

Standard training

1. Which statement about biological variation is correct ( )

A. Biological variations can be inherited

B. Biological mutations are beneficial to biological survival

C. Biological mutations are detrimental to biological survival

D. Any variation in a trait that can be repeated in future generations is considered a heritable variation.

2. The father’s blood type is type A and the mother’s blood type is B, but she gives birth to a child with type O. This is a mutation of ________.

3. A doctor’s arms are often exposed to X-rays due to his work. He is worried that the genes in the skin cells will change and be passed on to future generations. Do you think what he is worried about may happen? Why?

Answer: It won't happen. Because genetic changes in skin cells cannot be passed on to the next generation through gametes.

Keywords: Beijing Normal University version of the eighth grade biology PPT courseware for the first volume free download, genetics and environment PPT download, .PPT format;

For more information about the PPT courseware "Heredity and Variation of Organisms Heredity and Environment", please click the Inheritance and Variation of Organisms PPT Heredity and Environment PPT tab.

"Heredity and Environment" PPT courseware:

"Heredity and Environment" PPT courseware Part 1: Knowledge review: 1. What is genotype? Refers to the genetic makeup of an individual organism. 2. What is phenotype? Refers to a specific characteristic of an individual organism. Why are the phenotypes of skin color different in different races?

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Update Time: 2024-09-15

This template belongs to biology courseware Beijing Normal University Edition Eighth Grade Biology Volume 1 industry PPT template

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