Each of the following is a type of RNA except
A.) carrier RNA
B.) messenger RNA
C.) ribosomal RNA
D.) transfer RNA
Ans: A.) carrier RNA
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You cross a true-breeding stock of black BB. mice with skinny (SS) toes to a stock of white bb. mice with fat (ss) toes. From this, you produce an F1 generation of black mice with skinny toes (Bb, Ss)
If the single genes responsible for coat color and toe appearance do not sort independently, then you would expect to see: A. more than 75% of your F2 black mice with skinny toes. B. more than 25% of your F2 black mice with fat toes.
In conifers, the megasporocyte undergoes meiosis to produce four daughter cells. How many of these survive to develop into gametophyte(s)?
a. two b. three c. one d. four
Helium is an inert gas that rarely reacts with other elements because it has the maximum number of valence electrons in its outer shell.
Answer the following statement true (T) or false (F)
Platys and swordtails are related tropical freshwater fish. In studies, researchers have shown that female platys prefer males with swordtails, even though males of their own species do not have them. This was discovered by attaching artificial swordtails to platys males.What does this suggest about the origin of the swordtail feature?
A. The same gene that causes sword development also causes development of neural circuits for female preference. B. Female preference for swords may have predated the origin of the feature itself. C. Evolution of swords later led to evolution of female preference for swords. D. Adjacent genes on the same chromosome cause sword development and development of neural circuits for female preference.