FRHD 2270 Lecture Notes - Lecture 3: Fundamental Theorem Of Arithmetic, Speech-Language Pathology, Autosome

• School: University of Guelph
• Department: Family Relations and Human Development
• Course: FRHD 2270
• Professor: Robyn Pitman

Document Summary

The human body has 46 chromosomes (23 pairs); these are tiny structures that contain genetic material; each pair are called alleles and each pair can be different. Autosomes: first 22 pairs; all same size; 23rd pair determines sex of the child (xx = girl, xy = boy); same homosias, different hedrosias. Phenotype: genetic instructions with environmental influences; tan = manipulated phenotype by environment; individuals physical, behavioural and psychological features. Dominant genes: expressed, chemical instructions are followed; can be seen in both homo and heterozygous. Recessive genes: if paired with dominant gene, will not be expressed; only expressed when alleles are homozygous(the same) Monozygotic twins: identical twins; single fertilized egg that splits in two; share 100% of genes. Dizygotic: fraternal twins; two separate fertilized eggs by two separate sperm; share 50% of genes. Abnormal number of chromosomes: extra, missing or damaged; more common; ex. downsyndrome, xxx syndrome.