Autosomal chromosome pairs are identical, whereas the sex chromosome pair in males is not
a. True
b. False
Indicate whether the statement is true or false
True
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The actin cytoskeleton is associated with which type of cell movement?
A. movement of cilia B. ameboid crawling C. transport of organelles within a cell D. Answers b and c are both correct.
Which group of mammals exhibits the widest
distribution and greatest diversity? a. marsupials b. monotremes c. placentals d. marsupials and monotremes e. placentals and monotremes
The chemical colchicine prevents the formation of microtubules. It is commonly used in certain experimental procedures to cause changes in cellular chromosomes. Which of the following changes is it likely to be used to create?
A) Induction of mutant polyploid individuals B) Induction of mutant aneuploid individuals C) Prevention of nondisjunction in cell cultures D) Induction of chromosomal deletions in experimental cell lines E) Induction of chromosomal duplications in experimental cell lines
Chromosomes "decondense" into diffuse chromatin
a. at the end of telophase. b. at the beginning of prophase. c. at the end of interphase. d. at the end of metaphase. e. only in dying cells.