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A stock homozygous for three recessive autosomal genes, a, b,and c, not necessarily linked on the same chromosome, ismated to a stock homozygous for their dominant wild-typealleles. F1 females are then backcrossed to males of thehomozygous recessive parental stock and thefollowing cross results are observed:
Phenotype Number Phenotype Number
a bc 42 a b+ 6+ ++ 48 + +c 4a ++ 46 a +c 5+ b+ 44 + bc 5
1. Which of these genes are linked?
2. What is the recombination frequency between the linkedgenes?
In a cross of AABbCcdd x AaBbccDd what proportion of offspring will have the genotype of AABBCcdd? Please explain.
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What are the yeast homologs (genes in yeast with the same function as EIF2AK3 eukaryotic translation initiation factor 2-alpha kinase 3?
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