PSYC 1010 Lecture Notes - Phenotype, Twin, Reciprocal Altruism

• School: York University
• Department: Psychology
• Course: PSYC 1010
• Professor: all

Document Summary

Genotype specific genetic makeup of an individual: are present from conception and can be never changed. Phenotype- observable characteristics produced by the genetic endowment: can be affected by other genes and by the environment. Chromosome a tightly coiled molecule of deoxyribonucleic acid (dna)that is partly covered by protein. The dna portion of the chromosome carried heredity blueprint in units called genes. Every cell has 46 chromosomes (23 pairs) Exception is the sex cell (egg and sperm) Come to form new call with 46 chromosomes. Alternative forms of a gene that produce different characteristics are called alleles. Genotype and phenotype are not identical because some genes are dominant and some are recessive. Dominant gene from either parent will display the particular characteristic it carries. If the gene is recessive the characteristic will not show up unless partner gene inherited from other parent is also recessive. Polygenic transmission multiple gene pairs influence phenotype.