Miniature wings in Drosophila result from an X-linked allele (Xm) that is recessive to the allele for long wings (X+). Sepia eyes are produced by an autosomal allele (s) that is recessive to an allele for red eyes (s+). a. A female fly that has miniature wings and sepia eyes is crossed with a male that has normal wings and is homozygous for red eyes. The F1 flies are intercrossed to produce the F2. Give the phenotypes, as well as their expected proportions, of the F1 and F2 flies. b. A female fly that is homozygous for normal wings and has sepia eyes is crossed with a male that has miniature wings and is homozygous for red eyes. The F1 flies are intercrossed to produce the F2. Give the phenotypes, as well as their expected proportions, of the F1 and F2 flies.
Miniature wings in Drosophila result from an X-linked allele (Xm) that is recessive to the allele for long wings (X+). Sepia eyes are produced by an autosomal allele (s) that is recessive to an allele for red eyes (s+). a. A female fly that has miniature wings and sepia eyes is crossed with a male that has normal wings and is homozygous for red eyes. The F1 flies are intercrossed to produce the F2. Give the phenotypes, as well as their expected proportions, of the F1 and F2 flies. b. A female fly that is homozygous for normal wings and has sepia eyes is crossed with a male that has miniature wings and is homozygous for red eyes. The F1 flies are intercrossed to produce the F2. Give the phenotypes, as well as their expected proportions, of the F1 and F2 flies.
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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Miniature wings in Drosophila result from an X-linked allele (Xm) that
is recessive to the allele for long wings (X+). Sepia eyes are produced by
an autosomal allele (s) that is recessive to an allele for red eyes (s+).
a. A female fly that has miniature wings and sepia eyes is crossed with a
male that has normal wings and is homozygous for red eyes. The F1 flies
are intercrossed to produce the F2. Give the
expected proportions, of the F1 and F2 flies.
b. A female fly that is homozygous for normal wings and has sepia eyes is
crossed with a male that has miniature wings and is homozygous for red
eyes. The F1 flies are intercrossed to produce the F2. Give the phenotypes,
as well as their expected proportions, of the F1 and F2 flies.
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