The gene for a certain sex-linked trait is found only on the Y chromosome. If the male parent carries this gene, which of the following statements about the inheritance of that trait is true?
a. The trait will be expressed in 100 percent of the female offspring.
b. The trait will be expressed in 50 percent of the female offspring.
c. The trait will be expressed in 100 percent of the male offspring.
d. The trait will be expressed in 50 percent of the male offspring.
c. The trait will be expressed in 100 percent of the male offspring.
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The animal labeled "E" is a
a. mosquito of the genus Aedes. b. mosquito of the genus Anopheles. c. mosquito of the genus Culex. d. fly of the genus Musca. e. tick of the genus Amblyoma.
There are three alleles controlling the ABO blood types. IA and IB are codominant genes so that the
combination IAIB produces the AB blood type. The third allele, IO, is recessive to the other two alleles. Indicate which of these parents could produce the given child:Parents Child Yes or No (a) A ? AB B (b) A ? O A (c) A ? B O (d) A ? AB O (e) A ? AB B (f) B ? B O Observing Patterns in Inherited Traits 115 (g) AB ? AB A What will be an ideal response?
Plants and other photosynthetic organisms are
1.decomposers. 2.primary producers. 3.consumers. 4.bacteria. 5.fungi.
Which of the following are characteristic of both rhizobia and mycorrhizae?
I) They both benefit by receiving sugars from the plant. II) They both become parasitic in nutrient-rich environments. III) They both enhance the growth of most plants. IV) They both are found in most ecosystems of the world. A) only I and II B) only I, III, and IV C) only III and IV D) I, II, III, and IV