CYAF 160 Lecture Notes - Lecture 3: Quantitative Trait Locus, Behavioural Genetics, Phenotype

• School: UNL
• Department: Child, Youth and Family Studies
• Course: CYAF 160
• Professor: Shen

Document Summary

Chapter 2-cyaf 160 lecture 3 -genetics and human development. Parents providing reading materials and verbal training: both nature and nurture influence development. Debate does not take into account individual choices. Human genetic basics: each human cell contains 46 chromosomes in 23 pairs, 3b nucleotide pairs-> 23,000 pairs-> 46 chromosomes, not all 23000 genes get to be expressed (lucky ones) Also impacted by dominant-recessive inheritance: dominant-recessive inheritance. Dominant characteristic is expressed (bbxbb: recessive gene (b) Exception: x-linked inheritance- a recessive characteristic is expressed because it is carried on the males x. Genetic basics: expression of traits: genotype- the totality of an individual"s genes. The actual genes: xx or xy: phenotype- actual characteristics expressed. What is seen or observed: female or male: polygenic inheritance. Most characteristics in human development are not determined solely by a single pair of genes. Examples of polygenic inheritance include height, weight, skin color, intelligence, personality and more.