Crossing over is one of the most important events in meiosis because _________________.
A. it produces new combinations of alleles on chromosomes
B. homologous chromosomes must be separated into different daughter cells
C. the number of chromosomes allotted to each daughter cell must be halved
D. homologous chromatids must be separated into different daughter cells
E. the number of chromosomes allotted to each daughter cell must be split in fourths
Answer: A
You might also like to view...
Methylene blue
a. is used to kill cells that are moving too quickly to observe. b. detoxifies cells so they are safe to handle. c. is used as food for Physarum cells. d. is a biological stain used to increase contrast of transparent cells.
Development of the neural system is characterized by
A. body parts being shaped and patterned into a specific form. B. cells becoming specialized in structure and function. C. cell division and growth in size. D. All of the choices are correct. E. None of the choices are correct.
Someone who has broken an arm and has had a cast on it for months will notice a distinct shrinking of the arm once the cast is removed. Why does this happen?
A) Muscles that are not used will atrophy. B) The cast has reduced blood flow to the muscle tissue to reduce swelling. C) If the person was right-handed, he or she will become left-handed. D) The other arm was used more to compensate for the unused one, and it has become stronger.
The chamber of the inner ear that is shaped like a tightly-wound snail shell is the ________.
Fill in the blank(s) with the appropriate word(s).