In chickens, a dominant hereditary abnormality homozygous (CC). The recessive condition Another gene locus with co dominant alleles

Human Anatomy & Physiology (11th Edition)
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Chapter1: The Human Body: An Orientation
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Problem 7
In chickens, a dominant hereditary abnormality (e.g., creepers) causes death when the genotype is
homozygous (CC). The recessive condition (cc) at this locus produces a normal phenotype.
Another gene locus with co dominant alleles is known to govern feather color such that the
genotype FF = black, ff= splashed white, and Ff = blue. Also, a completely dominant gene W
produces white skin. Yellow skin is produced by the homozygous genotype ww.
a. In CcFfWw x CcFfWw, what proportion of the live progenies is
a.l Ceffww
a.2 normal, blue feathered, white skinned
a.3 ccFfWw
a.4 carriers of the lethal gene
a.5 white feathered, yellow skinned creepers
b. In CCFFWW x ccffWw, what proportion of the offspring is
b.1 ccFfww
b.2 normal, white feathered, white skinned
b.3 yellow skinned
Transcribed Image Text:Problem 7 In chickens, a dominant hereditary abnormality (e.g., creepers) causes death when the genotype is homozygous (CC). The recessive condition (cc) at this locus produces a normal phenotype. Another gene locus with co dominant alleles is known to govern feather color such that the genotype FF = black, ff= splashed white, and Ff = blue. Also, a completely dominant gene W produces white skin. Yellow skin is produced by the homozygous genotype ww. a. In CcFfWw x CcFfWw, what proportion of the live progenies is a.l Ceffww a.2 normal, blue feathered, white skinned a.3 ccFfWw a.4 carriers of the lethal gene a.5 white feathered, yellow skinned creepers b. In CCFFWW x ccffWw, what proportion of the offspring is b.1 ccFfww b.2 normal, white feathered, white skinned b.3 yellow skinned
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