Psychology 1000 Lecture Notes - Lecture 10: Twin, Sickle-Cell Disease, Zygosity

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

Document Summary

Nature (something we"re born with) vs. nurture (something we learn) 1 set of sex chromosomes (xx or xy) Rna codes for sequences of amino acid (proteins) The influence of genes is through protein synthesis there are no genes for a particular attribute. But environment can influence protein synthesis as well. Genes determine the range of possibilities but not the degree of expression. Environmental exposure at specific interval is critical e. g. white-crowned sparrow must hear adult song between 7th and 60th day. Phenotype: outward expression of genotype (characteristics, behaviours, etc. ) Outward characteristics may not indicate underlying genetic contribution. Alleles: different version of what a molecule on dna can look like. Dominant: produces effect in either homozygous or heterozygous mode. Recessive : produces effect only homozygous mode. Sometimes, it"s not one or the otherit"s a blend. E. g. sickle cell anemia,,, heterozygous yields both. Traits related to action of more than 1 gene or chromosome.