A chromosome contains the following gene order: A B C D • E F G H Which of the following rearrangements represents a paracentric inversion?
A) A B C • D E F G H
B) A F G H • B C D E
C) A C B D • E F G H
D) A F D E • C B G H
E) A B C D • H G F E
C
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If the peptidoglycan layer is between two plasma membranes in an organism, that organism is
a. Gram-negative b. an archaean c. Gram-positive d. chemoautotrophic e. eukaryotic
Three nucleotides code for one amino acid
__________________ Indicate whether the statement is true or false.
Among dogs, short hair is dominant to long hair and dark coat color is dominant to white (albino) coat color. Assume that these two coat traits are caused by independently segregating gene pairs
For each of the crosses given below, write the most probable genotype (or genotypes if more than one answer is possible) for the parents. It is important that you select a realistic symbol set and define each symbol below. Parental Phenotypes Phenotypes of Offspring Short Long Short Long Dark Dark Albino Albino (a) dark, short × dark, long 26 24 0 0 (b) albino, short × albino, short 0 0 102 33 (c) dark, short × albino, short 16 0 16 0 (d) dark, short × dark, short 175 67 61 21 Assume that for cross (d), you were interested in determining whether fur color follows a 3:1 ratio. Set up (but do not complete the calculations) a Chi-square test for these data [fur color in cross (d)].
There is some indication that the code is in some way ordered; a certain pattern exists. Describe an observation that supports this view
What will be an ideal response?