Biology
alishapatel2003
41

In certain plants, tall is dominant to short. If a heterozygous plant is crossed with a homozygous tall plant, what is the probability that the offspring will be short? A) 1 B) 1/2 C) 1/4 D) 1/6 E) 0

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ace098123098

The answer is E) 0. If: A - dominant allele, a - recessive allele, then: AA - dominant homozygous (tall), aa - recessive homozygous (short), Aa - heterozygous (tall). A heterozygous plant (Aa) is crossed with a homozygous tall plant (AA): Parental generation:         Aa     x    AA F1 generation:           AA     AA     Aa     Aa All of the offspring is tall (AA or Aa), since tall is dominant to short. There is no chance for offspring to be short (aa).

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