BIO121ch11

BIO121ch11 - BIO121 I. Chapter 11 A. Genes A.1. Genes:...

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BIO121 I. Chapter 11 A. Genes A.1. Genes: information units in chromosomes A.2. Locus: site of a gene in the chromosomes A.3. Allele: Different forms of gene. Same homologous chromosomes. B. Gene Pairs: B.1. Diploid Individuals: genes have pairs of alleles. On homologous chromosomes. B.2. Homozygous: two identical alleles. B.3. Heterozygous: two different alleles. C. Gene Expression C.1. Dominant Allele C.1.a) Makes expression of a recessive allele C.2. Phenotype: Appearance (i.e. Lactose intolerant) C.3. Genotype: genetic constitution D. Mendel’s Principle of Segregation D.1. During meiosis paired alleles separate D.2. Gametes (haploid) have one allele per locus E. Medel’s Principle of Independent Assortment E.1. Alleles of different loci distributed randomly into gametes E.2. Recombination produces new gene combinations not present in parental (P) generation. F. Crosses F.1. Monohybrid cross F.1.a) Homozygous parents (P generation) F.1.b) Alleles differ at one locus F.2. Dihybrid Cross
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BIO121ch11 - BIO121 I. Chapter 11 A. Genes A.1. Genes:...

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