TOPAK PPT.pptx

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HEREDITYPresented by IAN PAUL CONDES MUOZThe Fisher Valley CollegeS/Y 2015 16General PsychologyObjectives of the presentationHEREDITY: What does it mean?Brief History of HEREDITYThe role of GENETICSDifferentiating DNA and RNARole of HEREDITY and ENVIRONMENT in the development of personality and behaviorIntro to HeredityDuring family reunions, have you ever heard any of your relatives say that you look like your father or mother? Possibly, more than one occasion that you were told that you resemble your parents, grandparents, or any relative. This is where HEREDITY comes in.

In this presentation, I shall discuss to you what HEREDITY is about. HEREDITYrefers to a biological mechanism as a result of which a child obtains something in terms of specific species or ancestral characteristics by which he can trace his individuality from his ancestral stock through his parents

the manner in which traits and characteristics are passed from parent to offspring

thus contributes something in the form ofINHERITANCEBrief History of HEREDITYThe idea of Heredity began in the ancient times when philosophers started to ask about humanity. The following were philosophers / scientist that contributed to the development of Heredity:Theophrastusproposed that male flowers caused female flowers to ripenHippocratesspeculated that "seeds" were produced by various body parts and transmitted to offspring at the time of conceptionAristotlethought that male and female semen mixed at conception. Aeschylus, in 458 BC, proposed the male as the parent, with the female as a "nurse for the young life sown within her".During the 18th century, Dutch microscopistAntonie van Leeuwenhoek(16321723) discovered "animalcules" in the sperm of humans and other animals.GENETICSis the study of HEREDITYthe scientific study of how genes control the characteristics of plants and animalsa branch of biology that deals with the heredity and variation of organismsDNARNAdnaor deoxyribonucleic acid

a substance that carries genetic information in the cells of plants and animalsrnaor ribonucleic acid

a substance in the cells of plants and animals that helps make proteinsGetting Bored?

The role of heredity and environment in the development of personality and behaviorGregor Mendel (1822 1884) was the first to use the method of selective breeding in the investigation of the inherited traits by crossing different types of peas.Selective Breeding is the method of studying inheritance, members of some specific specie high or low in a particular trait copulate with other members of the species in the same position and then the genetic characterof the so-produced offspring is made the subject of study.In actual experimentation it is impossible to get individuals having the same heredity (possessing exactly the same genes). Hence it is difficult to make the heredity factor as constant.

On the other hand, it is also impossible to get the environmental factors as constant because it is very difficult to provide exactly the same environment for different individuals. Even a mother cannot show equal amount of love and affection to her own children.

SUMMARY