CAS PS 101 Lecture Notes - Lecture 8: Human Genome Project, Haemophilia, Epigenetics

• School: Boston University
• Department: Psychological & Brain Sciences
• Course: CAS PS 101
• Professor: Barak Caine

Document Summary

Some things are clearly inheritable through genes. There are definitely critical periods, especially pre- or post-natal. Dna, chromosomes, genes 23 from mother paired with 23 from father. Dominant and recessive characteristics heritable traits. Sex-linked characteristics largely due to 23 chromosomes. X is larger and carries more genes. Male susceptibility to sex-linked inheritance: for female, having a recessive gene for a disease can be prevented by the other x chromosome; women would only become a gene carrier. However, for male, inherited recessive gene stand out since the other chromosome #23 is a y fmakes x single and dominant. Has identified all human genes = around 30,000. Genetic defects and abnormalities clearly account for some disorders cystic fibrosis, sickle-cell anemia, down"s syndromes (47 chromosomes) Others may be polygenic repeats or deletions of dna base pairs, and be partly environmental. Twin studies provide information on concordance, including genetic concordance. Studies in humans analyze genes or chromosomes for abnormalities or differences.