640Lecture0205

640Lecture0205 - Morphological Variation Variation: Part 2...

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Morphological Variation Variation: Part 2 – morphological variation: • MENDELIAN vs non-MENDELIAN How to calculate the frequency of alleles in a population variation : the first level morphological variation – Mendelian variability in morphological characters • domesticated animals –shorthorn cattle HAIR COLOR : white / roan / red white red roan coat color in cattle white = NN homozygotes roan (mixture of white and red hairs) – NR heterozygote red = RR homozygotes coat color in cattle Study by Sewall Wright (1917) – 756 white – 3780 roan – 4169 red – 8705 total in the breed population How do we calculate allele frequencies in this population? COUNT ALLELES
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coat color in cattle Study by Sewall Wright (1917) – 756 white = 1512 N alleles – 3780 roan = 3780 N alleles + 3780 R alleles – 4169 red = 8338 R alleles total = 5292 N + 12,118 R 17,410 total genes = 2 x 8705 – frequency of N = 5292 / 17,410 = 0.304 – frequency
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This note was uploaded on 07/17/2008 for the course EEOB 640 taught by Professor Fuerst during the Spring '05 term at Ohio State.

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640Lecture0205 - Morphological Variation Variation: Part 2...

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