For each of the following characteristics, indicate whether it would be considered a discontinuous characteristic or a quantitative characteristic. Briefly justify your answer. a. Kernel color in a strain of wheat, in which two codominant alleles segregating at a single locus determine the color. Thus, there are three phenotypes present in this strain: white, light red, and medium red. b. Body weight in a family of Labrador retrievers. An autosomal recessive allele that causes dwarfism is present in this family. Two phenotypes are recognized: dwarf (less than 13 kg) and normal (greater than 23 kg). c. Presence or absence of leprosy. Susceptibility to leprosy is determined by multiple genes and numerous environmental factors. d. Number of toes in guinea pigs, which is influenced by genes at many loci. e. Number of fingers in humans. Extra (more than five) fingers are caused by the presence of an autosomal dominant allele.
For each of the following characteristics, indicate whether it would be
considered a discontinuous characteristic or a quantitative characteristic.
Briefly justify your answer.
a. Kernel color in a strain of wheat, in which two codominant alleles
segregating at a single locus determine the color. Thus, there are three
b. Body weight in a family of Labrador retrievers. An autosomal recessive
allele that causes dwarfism is present in this family. Two phenotypes are
recognized: dwarf (less than 13 kg) and normal (greater than 23 kg).
c. Presence or absence of leprosy. Susceptibility to leprosy is determined
by multiple genes and numerous environmental factors.
d. Number of toes in guinea pigs, which is influenced by genes at many
loci.
e. Number of fingers in humans. Extra (more than five) fingers are caused
by the presence of an autosomal dominant allele.
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