10 Jun BIOL 1408 – In snapdragons, heterozygotes have pink flowers
uestion
1) In snapdragons, heterozygotes have pink flowers, whereas homozygotes have either red or white flowers. This is an example of incomplete dominance. A plant with red flowers (RR) is crossed with one that has white (rr) flowers.
a. When plants with red flowers are crossed with plants with white flowers, what proportion of the offspring will have pink flowers? Why?
b. When two plants with pink flowers are crossed, what is phenotypic ratio and genotypic ratio of the offspring.
2) Roan color in cattle is the result of absence of dominance between red and white color genes and the cattle are red and white in color. This is another example of incomplete dominance.
a. If a homozygous red bull is breed to a homozygous red cow, what are the possible phenotypes and genotypes of the calf?
b. How would one produce a herd of roan-colored cattle?
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