"There are certain regularities in the inheritance of traits" PPT courseware

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"There are certain regularities in the inheritance of traits" PPT courseware

Part One: Review the past and learn the new

1. In human body cells, there are _____ chromosomes.

2. In somatic cells, the _______ that controls biological traits is located on the paired _______, so it also exists in ______.

Read, discuss and collaborate in groups to complete the following basic concepts

1. Alleles

2. Dominant genes and recessive genes

3. Dominant traits and recessive traits

4. Genotype and phenotype

There are certain regularities in trait inheritance PPT, the second part of the content: Which group of students remembers it quickly and accurately

1. Alleles: In a pair of genes, two different genes are called alleles

2. Dominant genes and recessive genes: Among alleles, the gene that can be expressed is called a dominant gene;

Genes that have no expression are called recessive genes

3. Dominant traits and recessive traits:

The traits controlled by dominant genes are dominant traits:

Traits controlled by recessive genes are recessive traits

4. Genotype and phenotype: In genetics, the genetic composition of an individual organism is called genotype;

A specific characteristic expression of a biological individual is called a phenotype

There are certain regularities in trait inheritance PPT, the third part of the content: Knowledge competition

1. Which of the following biologists discovered the laws of inheritance during the pea hybridization experiment ( ).

A. Darwin B. Mendel

C. Yuan Longping D. Lin Nai

2. Whether a person has earlobes or not depends on the person's ( ).

A. Genetic composition B. Chromosome composition

C. DNA composition D. Protein composition

3 Paired genes in fertilized eggs ( ).

A. All are dominant genes

B. One is a dominant gene and the other is a recessive gene

C. All are recessive genes

D. All of the above are possible

4. If someone has no earlobes (recessive trait), then the gene in the germ cells he produces is ( )

A.AA; B.aa; C.A or a; D.a

There are certain regularities in trait inheritance PPT, part 4 content: Assignment:

1. Complete post-class thinking and practice independently.

2. According to the requirements of the activity content in the textbook, follow the prompts, cooperate in groups, and try to complete the tables and discussion questions.

3. When Mendel did the pea hybridization experiment, he carefully selected materials, cleverly conceived, and conducted rigorous logical reasoning, thereby discovering the famous laws of inheritance and making outstanding contributions to the development of genetics. Please collect them after class. His relevant information, and introduce one of his experiments to everyone to experience the rigor and logic of his reasoning.

Keywords: Beijing Normal University version of the eighth grade biology PPT courseware for the first volume is free to download, there are certain regularity in trait inheritance PPT download, .PPT format;

For more information about the PPT courseware "The inheritance of biological inheritance and mutation traits have certain regularity", please click the "Heredity and mutation inheritance of living things have certain regularity" PPT courseware.

"There are certain regularities in the inheritance of traits" PPT:

"There are certain regularities in the inheritance of traits" PPT Part 1: Reviewing the past and learning the new 1. What are the traits of an organism? Tip: Morphological characteristics and physiological properties of organisms. For example, a person's facial features, skin color, body height, blood type, etc. 2. The characteristics of living things are...

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Update Time: 2024-09-09

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

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