11. A] A young boy is diagnosed with sideroblastic anemia (skin paleness, fatigue, dizziness and enlarged...

11. A] A young boy is diagnosed with sideroblastic anemia (skin paleness, fatigue, dizziness and enlarged spleen and liver), a
recessive, X-linked condition. If neither parent has sideroblastic anemia, what are their genotypes?
B] An A/a; B/b dihybrid is test-crossed, and ¼ of the progeny phenotypically resembles the dihybrid parent, while ¾
resembles the tester parent. If the dihybrid parent was selfed, what would be the expected phenotypic ratio in the
progeny?
C] Two strains of S. cerevisae (yeast) are crossed of genotype a ; B and A ; b (the two genes are on different
chromosomes and therefore independently assort). If a and b are synthetic lethal, what percentage of sexual spores
would you find in a non-parental ditype (NPD) ascus from this cross ?

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gladiator answered 1 year ago

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