PSYC 2015 Chapter Notes - Chapter 4: Lamarckism, Y Chromosome, Cytosine
Document Summary
Genes- unites of heredity that maintain their structural identity from one generation to another: chromosomes- pairs of genes. Composed of a double stranded dna molecule. Dna- serves as a template for the production of rna: adenine, guanine, cytosine, and thymine. Rna: adenine, guanine, cytosine, and uracil. Order of bases determines the type of protein being produced: mrna- serves as a template for the synthesis of protein molecules. Homozygous- people with identical pair of genes on the two chromosomes. Dominant gene- shows a strong effect in either the homozygous or heterozygous condition. Recessive gene- shows its effect only in the homozygous condition. Sex-linked genes- genes on the sex chromosomes (x + y: female has 2 x chromosomes, male has a x+y chromosome, controls red-green deficiency. Man with recessive gene on his x chromosome is red-greed deficient. Women is color deficient if she has that recessive gene on both of her x chromosomes.
