In fruit flies, the allele for vestigial wings is recessive to the allele for normal wings. In a generation of fruit flies, 18 males and 15 females with vestigial wings are produced, and 43 males and 44 females with normal wings are produced. Which of the following is the best conclusion you can make about the parents of this generation? (2 points) Select one: a. Both parents were heterozygous for wing type. b. One parent was heterozygous for wing type and the other was homozygous with normal wings. c. Both parents were homozygous with normal wings. d. One parent had vestigial wings and the other was heterozygous for wing type.
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Step 1: Determine the genotypes of the parents based on the offspring produced. Show more…
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The fruit fly, Drosophila, has either long wings or vestigial wings, as shown in Figure 2 below: Figure 2 Long-winged fly Vestigial-winged fly The size of the wings is determined by a pair of alleles: A and a. Long-winged flies have one of two possible genotypes: AA or Aa. Vestigial-winged flies have only one genotype: aa. a) Using the letters A and a give the genotype of a heterozygous fly. b) Why can vestigial-winged flies only have the genotype aa? c) A male and a female long-winged fly were crossed. They produced 96 offspring. Of the offspring 72 had long wings and 24 had vestigial wings. You may use a genetic diagram to explain this:
Adi S.
Male flies, heterozygous for both grey body and normal wings, were mated with black-bodied vestigial-winged females. 2000 offspring were counted. The resulting percentage of each type of offspring is shown in the table below: Resulting offspring Grey body, normal wings Black body, vestigial wings Grey body, vestigial wings Black body, normal wings Frequency 40% 40% 10% 10% What conclusion can be drawn from the information given above? A. The genes assort independently. B. A mistake has been made. C. The genes are linked. D. The genes are on separate chromosomes.
Jenny W.
1. In Drosophila, vestigial wings (vg) and black body (b) are recessive traits, both found on chromosome 2 separated by 19.5 map units. A female expressing both traits is crossed to a wild type male. The F1 individuals are crossed to yield F2 flies. Among the F2, what proportion of the total will be fully recessive females? a. 0.02438. b. 0.0975. c. 0.4025. d. 0.02438. e. 0.10062. f. 0.20125 2. From the cross above, what proportion of the total will be vestigial only males? - same answer choices has above.
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