PSYC 2500H Lecture Notes - Lecture 2: Hair, Albinism, Far-Sightedness

• School: Trent University
• Department: Psychology
• Course: PSYC 2500H
• Professor: Geoffrey Navara

Document Summary

Genetics in general: genotype (inherited genes) -> is expressed through -> phenotype (observable characteristics and behaviors, the influence of environment is acknowledged and essential for this process (not just physical but also emotion, temperament etc. coming from genetics. What do genes do: direct production of amino acids necessary for forming new cells, guide cells to develop different parts of the body, regulate pace and timing of development, may (cid:862)tur(cid:374) o(cid:374)(cid:863) or (cid:862)tur(cid:374) off(cid:863) other ge(cid:374)es. Patterns of genetic expression: simple dominant-recessive inheritance. If two alleles are homozygous: they are both dominant or both recessive. If two alleles are heterozygous: one is dominant and one is recessive, codomination or incomplete dominance, the phenotype they produce is a compromise between the two genes. Intelligence: skin colour, temperament, and susceptibility to cancer. Congenital problems: babies may have problems at birth due to hereditary or environmental causes, congenital problems, are present at birth but not always apparent.