"Heredity and Variation Phenomena" PPT

Description

"Heredity and Variation Phenomena" PPT

Part One: Learning Objectives

1. Correctly express concepts such as traits, relative traits, heredity, and variation.

2. Be able to give examples of different traits of animals, plants and humans and their relative traits; describe related biological inheritance and variation phenomena.

3. Develop the ability to read pictures by studying comics about trait inheritance in books.

4. Through the study of heredity and variation, you can understand the mysterious phenomena of nature. As long as you study in depth, you can understand everything, and cultivate a love for nature and a grateful heart.

PPT on heredity and mutation phenomena, part 2 content: course exploration

Explore theme one

traits and relative traits

1. Characters: morphological characteristics and physiological characteristics of organisms.

For example: the color, shape, texture, taste, etc. of grapes are all traits.

2. Relative traits: different expression types of the same trait in the same organism

for example

(1) The same kind of creature; such as human beings

a trait; e.g. eyelids

Different performance types; such as single eyelid, double eyelid

(2) The same organism; such as chrysanthemum

a trait; such as color

Different presentation types; such as white, yellow, red

Explore theme two

Heredity and mutation phenomena

1. Heredity: There are similarities in traits between children and parents, indicating that traits can be passed from parents to offspring.

For example: "If you sow melons, you will reap melons; if you sow beans, you will reap beans."

"A dragon begets a dragon, a phoenix begets a phoenix, and a mouse's son can dig holes."

2. Variation: the phenomenon of differences in trait expression between parents and children

for example:

"One tree bears fruit, sour and sweet in different varieties"

"A pig gives birth to nine sons, and a litter has ten offspring."

The differences in trait expression between parents and children include two levels:

① Between parents and offspring; ② Between individual offspring.

PPT on heredity and mutation phenomena, part 3: classroom activities

Appreciate and evaluate comics about trait inheritance

1. Analyze the relationship between the characters in the cartoon, namely father, mother, newborn and midwife.

2. Analyze the biological phenomena expressed in comics.

3. List examples from real life that are similar or different from the hooked nose and broken leg in the comics.

4. Group into groups to exchange personal opinions and discuss the phenomena of inheritance and variation.

5. Ask group members to report the results of the discussion.

PPT on heredity and mutation phenomena, part 4 content: Class summary

1. Characteristics and relative characteristics

1. Traits: The morphological characteristics and physiological characteristics of organisms are called traits in genetics.

2. Relative traits: Different expression types of the same trait in the same organism are collectively called relative traits.

2. Inheritance and variation of traits

1. Heredity: The phenomenon of traits being passed from parents to offspring is called heredity.

2. Variation: The phenomenon of differences in trait expression between parents and children is called variation.

PPT on genetics and mutation phenomena, part 5: training to meet standards

1. Which of the following are not relative traits ( )

A. Rabbit’s white fur and cat’s white fur B. Human single eyelids and double eyelids

C． Tall and short stems of peas D. Goldfish red eyes and black eyes

2. Among the following groups of traits, which ones are not relative traits ( )

A. Humans have earlobes and do not have earlobes

B. Tall and short stems of peas

C. Human double eyelids and single eyelids

D. Guinea pig’s long and curly hair

3. The biological phenomenon explained by the saying "One mother gives birth to nine sons, and the mother has ten offspring" is ()

A. Heredity B. Variation C. Reproduction D. Development

4. Some people have single eyelids, some people have double eyelids, some people have normal color vision, and some people are color blind. In biology, these morphological and physiological characteristics are called ( )

A. Gene B. Trait C. HeredityD. Mutations

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

For more information about the PPT courseware "Heredity and Variation of Biology, Phenomena of Heredity and Variation", please click the PPT tab of "Heredity and Variation of Biology, Phenomenon of Heredity and Variation".

"Heredity and Variation Phenomena" PPT courseware:

"Heredity and Variation Phenomena" PPT courseware Part 1: Traits 1. What are traits? The morphological characteristics and physiological characteristics of organisms are called traits in genetics. Tongue roll (can roll tongue, cannot roll tongue) Forehead hairline (V shape, straight shape) Ear lobe (with...

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Update Time: 2024-07-08

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

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