PSYC 2500 Lecture Notes - Lecture 4: Secondary Sex Characteristic, Developmental Disability, Phenylalanine

• School: Carleton University
• Department: Psychology
• Course: PSYC 2500
• Professor: Anne Bowker

Document Summary

Each cell in the human body has 46 chromosomes (23 pairs) Chromosomes are filled with dna: dna = the genetic blueprint. Allele: part of a gene; there are 2 alleles per gene. Work in pairs; alleles work in pairs: homozygous (same, heterozygous (different) Xx = female; xy = male: the x chromosome is bigger than the y chromosome. Genotype: set of genetic traits a person inherits; the genetic blueprint. Phenotype: set of traits a person actually displays (physical characteristics: genes work in pairs some are dominant, some are recessive. An error occurs during cell division (mitosis: do(cid:449)(cid:374)"s (cid:455)(cid:374)dro(cid:373)e (cid:894)triso(cid:373)(cid:455) (cid:1006)(cid:1005)(cid:895) = a(cid:374) e(cid:454)tra (cid:1006)(cid:1005)st chromosome. Any changes in genetic information (extra or less) abnormality. 12/10,00 births, occur more frequently in older mothers. Flattened faces, small noses, almond shaped eyes. Will likely need some level of support to live independently. Tur(cid:374)er"s (cid:455)(cid:374)dro(cid:373)e: missing an x chromosome, 1-4/10,000 births, genetically female, but sterile, normal iq, poor visual-spatial ability.