Black fur in mice (B) is dominant to brown fur (b). Short tails (T) are dominant to long tails (t). What fraction of the progeny of crosses BbTt × BBtt will be expected to have black fur and long tails?
A) 1/16
B) 3/8
C) 1/2
D) 9/16
C
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Identical twins have identical ____, but they do not always have identical ____
a. mitochondrial DNA; genotypes b. genotypes; mitochondrial DNA c. genotypes; phenotypes d. phenotypes; genotypes e. phenotypes; mitochondrial DNA
What is the electron transfer chain? a. Series of enzyme-mediated reactions
b. Mechanism in which a change can result in a decrease of an activity. c. Reaction in which one molecule will accept the electrons. d. Region on an enzyme that regulatory molecules will bind to. e. Array of enzymes that accept and give up electrons in sequence and release energy.
Mosses and liverworts are limited in size because they lack:a
sperm. b. eggs. c. vascular tissues. d. stomata. e. reproductive structures.
The two major types of viruses are DNA and RNA viruses.
a. true b. false