BI 215 3-14-11-Ch-9 - Figure 6.11(A Gondwana in the early...

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Figure 6.11 (A) Gondwana in the early Cretaceous, indicating approximate times connections among the southern land masses were severed
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Figure 6.13 Phylogeny of major lineages in 3 orders of birds, showing their association with land masses, as they were in the early Cretaceous (Part 1)
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Figure 6.13 Phylogeny of major lineages in 3 orders of birds, showing their association with land masses, as they were in the early Cretaceous (Part 2)
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Variation Chapter 9
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What is variation? Variation in  phenotype  vs. variation in  genotype Phenotype: characteristic in an individual  organism Everything except DNA Can include transcription (mRNA) level, protein,  appearance, behavior… Genotype: genetic makeup of an individual Often specified a few loci under discussion What is  heritable  variation?
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Terms to know Genotype Genetic makeup of an individual Locus Specific site on a chromosome Allele Specific copy of a gene Haplotype Sequence of DNA, distinct from  homologous copies
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Figure 9.1 Phenotypic variation caused by genetic differences within a species
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Where does variation come from? Genetic variation Different alleles and haplotypes Mutation is ultimate source Changes in base pairs of DNA
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Phenotypic variation
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BI 215 3-14-11-Ch-9 - Figure 6.11(A Gondwana in the early...

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