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Bio 101 Mendelian Chapter 11

Bio 101 Mendelian Chapter 11 - Outline 1 General Biology...

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Outline 1 General Biology 01:119:101‐Fall 2011 Dr. Monica Torres
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General Biology 01:119:101‐Fall 2011 Dr. Monica Torres Heredity and genetics 2 Transmission of genetic information from parent to offspring, generally follows
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General Biology 01:119:101‐Fall 2011 Dr. Monica Torres How to explain basic patterns of inheritance? 3 Offspring are a blend of both parents (i.e. in modern terms, alleles would blend together to form a completely new allele) The characteristics of the blended offspring are passed on the next generation Every generation should be more uniform (less variation) Characteristics can be passed from generation to generation through “discrete particle (now known as genes) The characteristics of both parents are passed on to the next generation as separate entities Variation is maintained over time
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Basic Term Locus : the site a gene occupies in the chromosome Gene : DNA segment that contributes to phenotype /function Alleles : alternative forms of a gene Example: the locus for eye color the alleles are blue eyes vs brown eyes Uppercase: dominant allele Lowercase: recessive allele
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Basic Terms Homozygous – possessing the same alleles on homologous chromosomes (i.e., BB) Heterozygous – possessing two different alleles on homologous chromosomes (i.e., Bb
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Genotype and phenotype Black female (BB) Brown male (bb) All (Bb)
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