Psychology 1000 Chapter Notes - Chapter 4: Hair Loss, Mitosis, Heritability

• School: Western University
• Department: Psychology
• Course: Psychology 1000
• Professor: Dr.Mike

Document Summary

Psychology 1000 chapter 4 notes (genes, evolution and behaviour) A chromosome is coiled dna, and dna only coils during mitosis; more specifically prophase: a gene is a specific fragment of dna; more specifically a set number of nucleotides on a chromosome. An allele is one version of a gene which has more than one version. Influence of genes is through the synthesis of proteins. The environment has an influence in protein synthesis: gene will only show (simplified) if genes inherited are dominant. If genes inherited are recessive, they will not affect the phenotype of an individual unless the other gene inherited from the opposite parent is also recessive. Recessive traits can be passed onto offspring even if they are not shown on phenotype; the genotype still has the allele present within their karyotype. Some genes combine their alleles to influence one part of the phenotype (polygenic transmission). Alternate forms of a gene that produces different characteristics are called alleles.