4 - 2008 BIO 320: Lecture 4 Sex linkage and Pedigree...

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white gene in Drosophila - Genetics by Morgan and company red-eyed Observations red-eyed X white-eyed F1 progeny are all red-eyed. Mate F1 females with F1 males. 3:1 ratio of red-eyed to white-eyed F2 progeny,but all white eyed flies are male P: F1: F2: Interpretation w + w + X w w + w w + X white-eyed w + w + w w BIO 320: Lecture 4 Sex linkage and Pedigree Analysis Sex-linkage: unusual patterns of inheritance are observed when genes reside on the sex chromosomes. A major difference observed from patterns of inheritance for autosomal genes is that reciprocal crosses produce different results. CROSS 2 Observations white-eyed X red-eyed + F1 females are all red-eyed. F1 males are all white-eyed. Mate F1 females with F1 males. P: F1: F2: Interpretation + w X w + w + w w X w w w + w w + w w 1:1:1:1 ratio of red-eyed females and males and white- eyed females and males white-eyed red-eyed red-eyed white-eyed w + w + Chapter 2: 2-29, 2-30, 2-31, 2-33, Chapter 4: 4-26, 4-27, 4-29, 4-31, 4-34, 4-37 QB: E1-16; F1-10. + + + + + + + + CROSS 1
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This note was uploaded on 06/03/2008 for the course BIO 320 taught by Professor N/a during the Spring '08 term at SUNY Stony Brook.

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4 - 2008 BIO 320: Lecture 4 Sex linkage and Pedigree...

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