"Who am I like" PPT courseware

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"Who am I like" PPT courseware

Part I: Heredity and genetic phenomena

Heredity: The phenomenon whereby organisms pass on their morphological characteristics or psychological characteristics to their offspring.

Interesting genetic phenomena

As the saying goes: "If you sow melons, you will get melons; if you sow beans, you will get beans." "A dragon will give birth to a dragon, and a phoenix will give birth to a phoenix." Heredity is a common phenomenon in the biological world. Parents pass genetic genes to their children, so that their children will show similar traits to their parents, such as body shape, appearance, temperament, voice, etc.

1. Close to 100% "absolute" inheritance.

① Skin color: Inheritance is impartial, leaving people with no choice. It always follows the natural law of "multiply and then average", giving you the "neutral" color of your parents. For example, if the parents have dark skin, they will never have children with fair skin; if one parent is white and the other is dark, then the "neutral" skin color of the child will be given to the child after being "averaged" during embryonic life.

② Jaw: It is a dominant inheritance that cannot be "negotiated", and the "resemblance" makes you helpless.

③Double eyelids: It is also an “absolute” genetic inheritance. Interestingly, the father’s double eyelids are almost 100% passed down to his children. Some children are even born with single eyelids, and as adults they are "replenished" with double eyelids like their father's. In addition, big eyes, big earlobes, high nose bridge, and long eyelashes are all characteristics that can be most inherited from parents when inheriting facial features.

2. More than half the probability of inheritance

①Height: Only 30% of the initiative is in your hands, because 35% of the factors that determine height come from the father and 35% from the mother.

② Obesity: If one parent is obese, the children have a 53% chance of becoming obese. If one parent is obese, the probability drops to 40%. This shows that about half of whether we are fat or not can be determined by human factors. We can completely maintain a well-proportioned body through a reasonable diet and adequate exercise.

③ Baldness: The Creator seems to be partial to women, allowing baldness to only be passed on to men. For example, if the father is bald, the son has a 50% chance. Even the mother's father will leave a 25% chance of being bald to his grandchildren. This gender genetic tendency, which is passed down from male to female, leaves men helpless.

3. Although it is hereditary, the probability is not high: baldness is a recessive inheritance with a low probability, so you don’t have to worry too much about whether your parents’ baldness will appear on your head in the same way.

4. Innate inheritance, acquired plasticity: Voice, usually the size and pitch of a boy's voice are like that of his father, and that of a girl is like that of her mother. However, if the voice quality inherited from parents is not beautiful, most of it can be changed through acquired pronunciation training. This allows some people whose voice conditions are not superior to realize their dream of a sweet voice through scientific and hard practice.

Who am I like PPT, part 2: mutation

Variation: The differences in morphological characteristics or physiological characteristics between the parents and offspring of an organism, and between the individuals of the offspring.

Heredity and variation are basic characteristics of living organisms.

It can be said that without inheritance, there would be no continuation of the species. Only with mutation can the living world be as colorful as it is now.

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"Who Am I Like" PPT:

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Update Time: 2024-09-11

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