BISC 102 Chapter Notes - Chapter 13, 20, 26, 27, 34: Moose, Helianthus Annuus, Helianthus Petiolaris
19 Jan 2018
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Sec 13. 6 - identifying human traits as autosomal or sex-linked: If trait is equally often in males and females = likely autosomal. If males more likely to have the trait, allele is likely recessive and on x chromosome (x-linked) The appearance of an x-linked recessive trait skips a generation in a pedigree. Good indicator of x-linked dominant trait: affected male has all affected daughters, no affected sons. Every daughter gets x chromosome from affected father, sons get x from unaffected mother. Genetic distinctions bc mutation, selection, drift act on each species independently of what is happening in other populations. Biological species concept: two diff populations do not interbreed, fail to produce viable and fertile offspring, they are diff species. Morphospecies : distinguishing features most likely to arise if populations are independent/isolated from gene flow. Applicable: no data on extent of gene flow, to sexual, asexual, fossil species.
