a. What are the genotypes of each parent? percent . What . A pedigree is not helpful to a counselor in predicting the probability of a recessive gene being present and the chances for an offspring to receive the gene and express the trait. What . What fraction of the children will have red eyes? a. What . Using the same information as for question #1, cross a heterozygous red-eyed female with a red-eyed male. B. ÐеÑ: 9. In fruit flies, the gene for white eyes is sex-linked recessive. Using the same information as for question #1, cross a heterozygous red-eyed female with a red-eyed male. What . 10) In fruit flies the most common eye color is red. Cross a white-eyed female with a normal red-eyed male. What are the genotypes of each parent? What percent of the females will have red eyes? Key: Parents What percent of females will have red eyes? Answer: Red-eyed 1: White-eyed 1 50% red-eyed and 50% white-eyed, respectively, (2 marks) 3. Describe the offspring phenotype and genotype ratios that resulted from crossing the parents that you chose on the Punnett squares screen. C. 50%. of the offspring will be carriers of the white eye trait? Problem 1: Crossing a white-eyed female and red-eyed male fly In a cross between a white-eyed female fruit fly and red-eyed male, what percent of the female offspring will have white eyes? Using the same information as for question #1, cross a heterozygous red-eyed female with a red-eyed male. Using these ratios, what percentage of offspring is white-eyed? d. What percent of the offspring will be carriers of the white yel! What percentage of offspring is red-eyed? The full question sounds like this: In fruit flies (Drosophila), one eye color gene is X-linked, with a recessive white allele and a dominant red allele. Using the same information as for question #1, cross a heterozygous red-eyed female with a red-eyed male. d. What percent of the offspring will be carriers of the white eye trait? A mutation (or allele) of the gene for eye 2. Answer: 25% of the offspring are white-eyed males. False Each member of a class sampled a piece of PTC testing paper. total percent. d. What percent of the offspring will be carriers of the white eye trait? White eyes? If a homozygous red eyed fly was crossed with a white eyed fly, what percent of the offspring would be homozygous recessive? White eyes? 100%. 2. (White eyes are X-linked, recessive) A. D. 75%. 2. E. 0% b. What are the genotypes of each parent? 25%. c) What is the probability that this same mating will produce any white-eyed males? of the offspring will be carriers of the white eye trait? In the fruit fly, Drosophila, eye color is a sex-linked recessive trait located on the X chromosome.Red eyes are dominant over white eyes. If white-eyed female flies are bred to red-eyed male flies, describe the expected offspring (assume all parental flies are true-breeding). In fruit flies, red eyes (R) are a dominant trait and white eyes (r) are recessive. What total percent of the offspring will be white-eyed? of the offspring will be white-eyed? White eyes? percent . What total percent of the offspring will be white-eyed? If a heterozygous female breeds with a white-eyed male, what percentage of the offspring are expected to have red eyes? (R) is red and (r) is white. Answer: 25% of the total offspring are white-eyed females (however, 50% of all females are white-eyed). What are the genotypes of each parent? Image Transcriptionclose. Using the same information as for question #1, cross a heterozygous red-eyed female with a red-eyed male. of the offspring will be white-eyed? total percent. 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