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| the number of chromosomes in birds |
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| the sex chromosomes in birds |
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| which chromosome is bigger? Z or W? |
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| traits linked to the Z chromosome |
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| why all sex-linked genes are dominant |
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Definition
| because there are no alleles of the same gene on the W chromosome to offer dominance |
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| Having one pair of a gene, e.g. a gene on the Z chromosome |
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| type of inheritance in which phenotypic expression is limited to one sex, e.g., egg production and milk yield |
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| sex-influenced inheritance |
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| type of inheritance where mode of gene expression differs between males and females |
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| sex linkage or sex-linked inheritance |
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| pattern of inheritance for genes located on sex chromosomes |
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| examples of sex-limited inheritance |
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-egg production -milk yield |
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| example of how day-old chicks can be sexed with minimum labor cost |
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Definition
-Barring is dominant over non-barring (solid black). -late feathering dominant over early feathering |
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