PSYC 2500 Lecture Notes - Twin, Trisomy, Intellectual Disability
7 Mar 2014
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Development: mechanisms of heredity, biology of heredity. The first 22 are autosomes, and the 23rd are the sex chromosomes. Dna is the main component of the chromosomes. She already hinted in 1950 that dna was a double helix. Took x-rays of atoms in order to understand their. Dna is made up of a phosphate, sugar, and nitrogenous base. These bases are adenine, guanine, thymine, and cytosine. Genotype and phenotype: physical manifestation). how one becomes the other (behavioral and: single gene inheritance. The same gene on a pair of chromosomes. Homozygous different. alleles are the same, while heterozygous alleles are. Heterozygous alleles will have a dominant and a recessive gene: genetic disorders. Sickle cell and cystic fibrosis are both recessive genetic disorders. Remember the working of the punnet square and the probability of a gene being expressed in different situations. The gene for cystic fibrosis is on chromosome 7. A third chromosome. is a trisomy of the sex chromosomes (extra x).
