What conclusion is consistent with these results?
A researcher is studying coat color in mice. Wild-type fur in mice is brown. Three pure-breeding strains of mice with white fur have been isolated. The strains are called milky, blanc, and weiss. White fur is a recessive trait in each strain. These mice are crossed to each other in pairs and the progeny phenotypes are recorded.
milky × blanc = all white progeny
milky × weiss = all brown progeny
blanc × weiss = all brown progeny
A) All three strains have mutations in the same gene.
B) All three strains have mutations in different genes.
C) The milky and blanc strains have mutations in the same gene; weiss has a mutation in a different gene.
D) The milky and weiss strains have mutations in the same gene; blanc has a mutation in a different gene.
E) The weiss and blanc strains have mutations in the same gene; milky has a mutation in a different gene.
C) The milky and blanc strains have mutations in the same gene; weiss has a mutation in a different gene.
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Signal integration and processing in the eye begin in the:
a. choroid b. lens c. vitreous body d. retina e. ciliary body
The evolution of many closely related species from one or a few ancestral species in a relatively short
period of time is referred to as: a. allometric growth. b. preadaptations. c. adaptive radiation. d. microevolution. e. allopatric speciation.
What tool or technique used by Ivanowski and Beijerinck while studying diseased tobacco plants enabled them to determine that the disease was caused by an agent significantly smaller than bacteria?
A. transmission electron microscopy that allowed them to view the tobacco mosaic virus B. porcelain filters that trapped bacteria but allowed passage of the virus C. cell culture that enabled cultivation of the virus D. scanning electron microscopy that enabled them to view the virus the tobacco mosaic virus
You are the owner of Jurassic Park, and you want to set about populating your park with extinct animals. The first animal you want to have in your park is a wooly mammoth, and you have a remarkably well-preserved specimen that was frozen in the Arctic
ice 20,000 years ago. Design a method for populating your park with many living wooly mammoths. What will be an ideal response?