pysc - Genetics Mendel-postulated of the existence of the...

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Genetics: Mendel-postulated of the existence of the gene. Gene: - is a unchanged element transmitted from one generation to the next that controls every trait in the human being. -found in the nucleus of every cell Chromosome:-a thread like strand of genes. (like a string of pearls) Cell Division Nucleus Cell 46 Chromosomes in the cell 1.They get together with their pair mate. There are 23 pairs. No two pairs look alike. 2. They get father 3. The line up along the center plane of the sphere 96 Chromosomes. 1.As cell division continues the cell’s duplicate themselves. At them same time, poles begin to form. 46 They begin to shrink 46 They begin to invaginate There is a exception…Sex Cells. (Third graphic) In a Sex Cell, the doubling does not take place. You have a single set of 23 pairs and they will eventually be ripped apart. Basically it’s the same thing except 23 pairs on each side. They become sex cells and they do not continue to divide. If it is a female, they become eggs. (Ovum)
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Gene Types Dominant: Any gene whose characteristic trait will prevail when it comes into contact with other genes. A dominant gene is always represented by a capital letter. B = Brown Hair Recessive: Any gene whose characteristic trait will not prevail when it comes into contact with other genes unless those genes themselves are recessive. A recessive gene is always represented by a small case letter. B = blonde hair It does not determine color, length, characteristics of hair type. Terms: Genotype-type of genetic make up a individual has. Phenotype- the observable characteristics that a individual has. Deoxyribonucleic Acid- biochemical basis of the gene. Of that DNA it makes up 40% of all chromosomal matter. Ribonucleic Acid- Comes in two forms, messenger RNA and transfer RNA RNA is involved in protein production. Proteins control all of life’s basic processes. One of life’s basic processes in thinking. Your brain is make up of cells and they need protein to. Therefore if you don’t have DNA and RNA to get proteins you don’t have perception, emotion, motivation, memory, abstract thinking., ect. Polygenic Inheritance- inherit traits because of they interaction of a number of genes.
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Behavior genetics: Behavior genetics-the study of the influence of heredity on behavior. Diseases: Sex linked characteristics 1. Always involve the 23 rd pair chromosome 2. Always something wrong with one of more of the chromosomes. 3. Always the proper number Examples of diseases- red green color blindness, muscular dystrophy, hemophilia, Genetic abnormalities 1. They do not have to be the 23 rd pair chromosome 2. There is never anything wrong with the chromosome’s 3. There are always to few or to many chromosome’s Down Syndrome - Indicates that there are not two chromosomes that make up the 23 rd pair, there are three chromosomes that make up the pair. So they have 47 pairs. - For the most part they are severely retarded.
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This note was uploaded on 04/18/2008 for the course PSYCH 2301 taught by Professor Taulbee during the Spring '08 term at Dallas Colleges.

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pysc - Genetics Mendel-postulated of the existence of the...

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