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LECTURE 5 ,[object Object],[object Object]
OBJECTIVES ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Lethal Genes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
If we cross two heterozygotes, expect a 3:1 ratio in progeny But, in yellow x yellow cross, get: 2 yellow : 1 nonyellow Explanation:
 
 
Coat color of rodents P :  Yellow  X  Yellow Yy  Yy G :  Y  y  Y  y F1: YY Yy yY yy Yellow   Yellow   Yellow   Grey (Die)
[object Object],[object Object],[object Object],[object Object],[object Object]
Inheritance of Huntington’s allele
Linked Genes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Linked genes in  Drosophila
SEX DETERMINATION IN HUMANS ,[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object]
 
 
Sex Linked Genes ,[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object]
 
X c X c Color blind  X X C Y Normal  X C X c X C X c X c Y X c Y Parent gamete progeny 100% carrier 100% color blind X c X c X C Y
 
Transmission of sex-linked genes

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