BIOL 180 Lecture Notes - Lecture 6: Mendelian Inheritance, Zygosity, Rickets
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BIOL 180 Full Course Notes
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Black and white rabbit grey rabbit. Pure-breeding line is a line with same phenotype. Whatever the hereditary stuff was for a particular trait, the pure lines only have one version of it. Why did mendel both to analyze 7 different traits? (not just one?) To test the hypothesis that the particular trait he was observing was not simply a weird trait. No medium plants, only tall or short. Only this way would the smaller plant re-appear in the f2 generation. Consistency in results makes his findings more reliable. Some alleles are dominant, some are recessive. Note #1: dominance and recessiveness are defined only in terms of the appearance in heterozygotes (eg. huntington"s disease, some rickets, etc. ) Note #2: most alleles are neither dominant nor recessive. T induces height t inhibits height homozygote heterozygote homozygote genotype phenotype. During gamete formation, pairs of alleles segregate (separate) and go into different gametes. Each gamete contains one allele of each gene.
