Which of these groups is characterized by having a TRUE coelom?
A) Roundworms
B) Arthropods
C) Cnidarians
D) Flatworms
E) Sponges
B
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Genetic maps are based on recombination frequencies. Because both odd and even numbers of crossovers can occur between any two gene loci, as the physical distance between two loci increases, the maximum recombination frequency levels off at 50%. However, suppose you discovered a species where only an even number of crossovers can occur between any two gene loci. In this case, as the physical distance between two loci increases, you would expect the maximum recombination frequency to
A. remain at zero. B. increase with no limit. C. level off at 25%. D. level off at 75%. E. level off at 100%. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain? Gather Content · What do you already know about recombination frequency? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
There are different versions of the gene that codes for fur thickness, one of which codes for
thicker fur and another that codes for thinner fur. In 1995, about 50 percent of the animals had thicker fur, and the other 50 percent had thinner fur. In the spring of 2012, after several years of low snow cover, 70 percent of the population had thicker fur, while only 30 percent had thinner fur. This change in the population is an example of
a. an adaptation. b. evolution. c. natural selection. d. homology.
____________________ are mutations involving the increase of the number of repeat sequences in
genes. Fill in the blank(s) with the appropriate word(s).
Classification based on shape
What will be an ideal response?