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Miniature wings in Drosophila result from an X-linked allele (w) that is recessive to the allele for long wings (+). In a cross of a long winged male with a long winged female, the following offspring were obtained: 100 long winged males, 106 miniature winged males, and 480 long winged females. Given this result, the female must be a carrier of the miniature wing allele. True False

Miniature wings in Drosophila result from an X-linked allele (w) that is recessive to the allele for long wings (+). In a cross of a long winged male with a long winged female, the following offspring were obtained: 100 long winged males, 106 miniature winged males, and 480 long winged females. Given this result, the female must be a carrier of the miniature wing allele. True False

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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**Genetics of Miniature Wings in Drosophila** Miniature wings in *Drosophila* result from an X-linked allele (w) that is recessive to the allele for long wings (+). In a cross of a long-winged male with a long-winged female, the following offspring were obtained: - 100 long-winged males - 106 miniature-winged males - 480 long-winged females Given this result, determine if the female must be a carrier of the miniature wing allele. **Question:** Given this result, the female must be a carrier of the miniature wing allele. - True - False **Explanation:** An analysis of this cross indicates that the presence of miniature-winged males among the offspring suggests that the female must be carrying the recessive miniature wing allele. This is because for a male to exhibit the miniature wing phenotype, he must inherit the X-linked recessive allele from his mother (since the male inherits his X chromosome from his mother and his Y chromosome from his father). Therefore, the female must be heterozygous, carrying both the miniature wing allele (w) and the long wing allele (+).
Transcribed Image Text:**Genetics of Miniature Wings in Drosophila** Miniature wings in *Drosophila* result from an X-linked allele (w) that is recessive to the allele for long wings (+). In a cross of a long-winged male with a long-winged female, the following offspring were obtained: - 100 long-winged males - 106 miniature-winged males - 480 long-winged females Given this result, determine if the female must be a carrier of the miniature wing allele. **Question:** Given this result, the female must be a carrier of the miniature wing allele. - True - False **Explanation:** An analysis of this cross indicates that the presence of miniature-winged males among the offspring suggests that the female must be carrying the recessive miniature wing allele. This is because for a male to exhibit the miniature wing phenotype, he must inherit the X-linked recessive allele from his mother (since the male inherits his X chromosome from his mother and his Y chromosome from his father). Therefore, the female must be heterozygous, carrying both the miniature wing allele (w) and the long wing allele (+).
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