Which letter(s) in the accompanying figure represents the anther?
a. A
b. B
c. C
d. D
e. both C and D
ANSWER: c
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In a two-point cross to map genes A and B, you obtained 98 recombinant types and 902 parental types among the offspring. How far apart are these genes?
A. 9.8 cM B. 0.98 cM C. 90.2 cM D. 9.02 cM E. .098 cM Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about two-point mapping? 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?
Answer the following statements true (T) or false (F)
1. Restriction enzymes bind to specific sequences of DNA to seal them together. 2. Most plasmids used in biotechnology contain a selectable marker such as an antibiotic-resistance (ampR) gene. 3. A DNA library is known as a genomic library when it is derived from mRNA. 4. If a large protein is run on a gel slab and subjected to electrophoresis, one would expect to find its band towards the top of the gel.
Which of the following secrete spicules?
a. sperm b. porocytes c. choanocytes d. amoeboid cells
If genetic tests showed that a tomato plant had viral DNA integrated into its chromosomes without outward symptoms caused by the virus, you could say that the tomato plant had
A) a rare form of viral infection. B) a transgenic infection. C) a lytic infection. D) a systematic infection. E) a lysogenic infection.