Drosophila females of wild-type appearance but heterozygous for three autosomal genes are mated with malesshowing the three corresponding autosomal recessivetraits: glassy eyes, coal-colored bodies, and striped thoraxes. One thousand (1000) progeny of this cross aredistributed in the following phenotypic classes:Wild type 27Striped thorax 11Coal body 484Glassy eyes, coal body 8Glassy eyes, striped thorax 441Glassy eyes, coal body, striped thorax 29a. Draw a genetic map based on these data.b. Show the arrangement of alleles on the two homologous chromosomes in the parent females.c. Normal-appearing males containing the samechromosomes as the parent females in the precedingcross are mated with females showing glassy eyes,coal-colored bodies, and striped thoraxes. Of 1000progeny produced, indicate the numbers of thevarious phenotypic classes you would expect.

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Drosophila females of wild-type appearance but heterozygous for three autosomal genes are mated with males
showing the three corresponding autosomal recessive
traits: glassy eyes, coal-colored bodies, and striped thoraxes. One thousand (1000) progeny of this cross are
distributed in the following phenotypic classes:
Wild type 27
Striped thorax 11
Coal body 484
Glassy eyes, coal body 8
Glassy eyes, striped thorax 441
Glassy eyes, coal body, striped thorax 29
a. Draw a genetic map based on these data.
b. Show the arrangement of alleles on the two homologous chromosomes in the parent females.
c. Normal-appearing males containing the same
chromosomes as the parent females in the preceding
cross are mated with females showing glassy eyes,
coal-colored bodies, and striped thoraxes. Of 1000
progeny produced, indicate the numbers of the
various phenotypic classes you would expect.

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