P elements cause which phenomenon responsible for sterility in Drosophila?
What will be an ideal response?
hybrid dysgenesis
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When a viral genome is integrated into the host chromosome but does not result in the lysis of the host cell, the condition is referred to as ________.
A. a lytic infection B. temperate infection C. lysogeny D. a virulent infection
Your roommate is having trouble with her biology lab and asks you for help, since you took biology last semester. She says she looked at an organism under a microscope in lab and is supposed to identify the organism based on what she saw
She knows she saw many cells with a nucleus, a cell membrane, and a structure that contained green pigments. (She thought it might have been a chloroplast.) What type of organism did she see? 1.a photosynthetic bacteria 2.a protist (single-celled eukaryote) 3.a plant 4.a prokaryote
It is difficult to make a vaccine against HIV because
a. the virus mutates rapidly. b. it is too expensive. c. it is a retrovirus. d. not enough is known about it. e. it contains reverse transcriptase.
In Dianne Dodd's experiments with Drosophila pseudoobscura, different populations were established that were raised on diets of either maltose or starch
When flies from the different populations were allowed to mate, some flies mated with flies fed on a different food source, but there was a preference for mating with flies raised on the same food source. What does this phenomenon illustrate about the timescale of speciation?