The pea plant was an excellent choice for
Mendel's experiments because
a. true-breeding varieties were available.
b. the plant can self-fertilize.
c. it can be cross-fertilized.
d. true-breeding varieties were available, and
it can be cross-fertilized.
e. true-breeding varieties were available, the
plant can self-fertilize, and it can be crossfertilized.
E
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Consider the following genetic study involving two autosomal genes. One of these, eye colour, has the dominant allele (R) for red eye colour and the recessive allele (r) for yellow eye colour. The other has the dominant allele (T) leading to paws with thumbs, while the recessive allele (t) codes for paws without thumbs. Presuming no linkage between the genes, what should be the phenotype ratio of the offspring produced by a testcross (RrTt ? rrtt)?
a. 1 red-eyed with thumbs: 1 yellow-eyed without thumbs b. 3 red-eyed with thumbs: 1 yellow-eyed without thumbs c. 1 red-eyed with thumbs: 1 yellow-eyed with thumbs: 1 red-eyed without thumbs: 1 yellow-eyed without thumbs d. 9 red-eyed with thumbs: 3 yellow-eyed with thumbs: 3 red-eyed without thumbs: 1 yellow-eyed without thum
Birds that have long narrow bills used for eating bivalves and other invertebrates are:
a. gulls. b. pelicans. c. shore birds. d. tubenoses. e. skuas and jaegers.
Describe how cells can regulate aerobic respiration at the level of the conversion of glucose-6-
phosphate to fructose-1, 6-bisphosphate as catalyzed by phosphofructokinase (PFK). What will be an ideal response?
PCR-based methods have largely replaced RFLP because of PCR's ability to process ___ samples or ___ samples.
What will be an ideal response?