ANT-1 Lecture Notes - Lecture 12: Punnett Square, Brachydactyly, Achondroplasia
Document Summary
Law of segregation: genes that code for traits occur in pairs. These pairs separate during gamete formation and then a different pair is formed at fertilization. Allele: an alternate form of a gene. Carries different information for the same trait. Dominant (t): expressed in the presence of another different allele. Recessive (t): is not expressed in the presence of another different allele. Locus: the location of a gene on a chromosome. Homozygous (hmz): two copies of the same allele (tt) Genotype: the actual letters/ what is present (tt) Phenotype: the physical expression of the alleles (tall) Law of independent assortment: genes that code for different traits sort. Some traits tend together more independently of each other. Ex: red hair, pale skin, freckles, light eyes = linkage. Simple inheritance: traits coded for by genes controlled by 1 locus. Alleles (a, b, o) code for antigens. Recessive: must get 2 copies of allele to inherent disorder.
