As a Drosophila research geneticist, you keep stocksof flies of specific genotypes. You have a fly that hasnormal wings (dominant phenotype). Flies with shortwings are homozygous for a recessive allele of thewing-length gene. You need to know if this fly withnormal wings is pure-breeding or heterozygous forthe wing-length trait. What cross would you do todetermine the genotype, and what results would youexpect for each possible genotype?

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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As a Drosophila research geneticist, you keep stocks
of flies of specific genotypes. You have a fly that has
normal wings (dominant phenotype). Flies with short
wings are homozygous for a recessive allele of the
wing-length gene. You need to know if this fly with
normal wings is pure-breeding or heterozygous for
the wing-length trait. What cross would you do to
determine the genotype, and what results would you
expect for each possible genotype?

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