Mendel crossed true-breeding plants having yellow peas with plants having green peas. The resulting
plants all had yellow peas. An F1 cross resulted in of the plants having yellow peas and of the
plants having green peas. What does this tell you about the alleles for color?
a. yellow is usually the dominant color, but sometimes green can be dominant
b. green is the dominant color
c. yellow is the dominant color
d. yellow is the recessive color
e. the F1 plants must have had some green peas that went unnoticed.
C
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Match the following items with the correct phrases.
_______1. Immune complex reactions; antigen-antibody complexes become deposited in tissue (e.g., the glomeruli of the kidneys), resulting in inflammatory damage. _______2. Anaphylactic reactions; examples include hayfever symptoms, hives, asthma, and the anaphylactic shock that could follow a bee sting or administration of penicillin. _______3. Cell-mediated reactions; antibodies don't play a major role. _______4. Cytotoxic reactions; involve the lysis of cells; the adverse reactions that follow incompatible blood transfusions are an example. a. type I hypersensitivity reactions b. type II hypersensitivity reactions c. type III hypersensitivity reactions d. type IV hypersensitivity reactions
Which of these insectivorous plants does not use an active trapping mechanism?
A. pitcher plants B. Venus flytraps C. sundews D. the aquatic waterwheel E. bladderworts
All of the following are fluid feeders EXCEPT
a. aphids. b. leeches. c. earthworms. d. ticks.
For codominant alleles, the frequency of the different phenotypes cannot be used to determine the
allele frequencies. Indicate whether the statement is true or false.