CHAPTER 3 - carrier already passed their genetic...

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CHAPTER 3 – Basic Concepts of the Chapter 1- Heredity involves passing along genes through reproduction. / Genotype variation is created by sexual reproduction. a. Variations of genes (alleles) are either dominant or recessive. b. The genome represents the genotype and the observable characteristics are the phenotype. c. Polygenic has many alleles associated with just one characteristic. Polygenic traits usually explain personality, and most human diseases. i. If the disease gene is recessive, then it lasts in the gene pool much longer compared to the one that is dominant diseased gene which is lethal to the carrier, does not tend to stay in the gene pool for a long time. ii. An example is Huntington’s disease which has a late onset, meaning that most likely the
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Unformatted text preview: carrier already passed their genetic information to their spawn (children have a 50-50 chance of getting it) and therefore it stays in the gene pool for a long time. 2-Genes are affected by behavior. a. Twin studies compare similarities between different types of twins to determine the genetic basis of specific traits. i. Monozygotic twins one egg splitting into two (ie. Identical twins) ii. Dizygotic twins two siblings who result from two separately fertilized eggs (ie. Fraternal twins) Differ in both genotype and phenotype. b. Adoption studies compare the similarities between biological relatives and adoptive relatives. c. d....
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