PSYC 2450 Lecture Notes - Lecture 2: Genetic Engineering, Xyy Syndrome, Phenylketonuria

• School: University of Guelph
• Department: Psychology
• Course: PSYC 2450
• Professor: Carol Anne Hendry

Document Summary

Direct production of amino acids necessary for forming new cells. Guide cells to develop different parts of body. Regulate pace and timing of development: may (cid:498)turn on(cid:499) or (cid:498)turn off(cid:499) other genes. Alleles influence many characteristics: one pair of genes, one member from mother, one from father. Simple dominant recessive inheritance: some alleles are stronger than others. If two alleles are homozygous: they are both dominant or both recessive. If two alleles are heterozygous: one is dominant and one is recessive. If two alleles are co-dominant (both are expressed to some extent: they are each heterozygous and equal. Sex-linked inheritance: males more likely to show x-linked recessive traits, e. g. , color blindness. Polygenic inheritance: trait influenced by multiple genes, e. g. , height, skin color, temperament. Babies may have problems at birth due to hereditary or environmental causes. Congenital problems are present at birth but not always apparent. Missing one x chromosome do not reach full development.