In which phase of meiosis does crossing-over take place
A) Prophase I
B) Prophase II
C) Metaphase I
D) Metaphase I
Ans: A) Prophase I
You might also like to view...
At which of the following time points in an action potential is a positive feedback process occurring in a neuron?
A. When the neuron is at rest. B. As the neuron is being depolarized and passes the threshold potential. C. After the peak depolarization of the action potential when it is rapidly repolarizing. D. During the undershoot phase when the neuron is slightly hyperpolarized relative to the resting potential. E. A positive feedback process is occurring at all the time points given.
The Pill
a. reduces menstrual cramps. b. can cause serious cardiovascular disorders especially in smokers. c. increases the risk of breast, cervical, and liver cancers. d. is the most common fertility control method in the United States. e. includes all of these.
In lakes and ponds of temperate latitudes, the upper and bottom layers of water usually turn over as water warms up during spring
Indicate whether the statement is true or false
Filopods harboring ________ are especially dangerous because the pathogens move about host tissues, even infecting the central nervous system, without being exposed to the immune system
a. Campylobacter jejuni b. Listeria monocytogenes c. Norwalk virus d. Yersinia enterocolitica