The characteristic “X” shape of chromosomes is _____. a. a result of maximum compaction of the chromosome b. due to the wrapping of DNA around histones c. only evident during cell division d. indicative of a cell that is no longer dividing e. only found in the female sex chromosome

During mitosis, organelles with different genotypes can end up in different cells within a single individual. What is one possible outcome of this random segregation of organelles during cell division? O dominant gain-of-function mutations dominant loss-of-function mutations O incomplete penetrance Ochromosomal duplication mutations O chromosomal deletion mutations

Crossing over _________________________.   a. only occurs in animal cells.     b. involves breakages and exchanges between sister chromatids     c. involves centrioles     d. results in new combinations of alleles being channeled into the daughter cells     e. occurs during mitosis

For most dividing cells in a diploid organism, the time spent in mitosis is approximately 4% of the total time of the cell cycle. In a population of continually dividing cells isolated from this organism, most of the cells would... A.have highly condensed chromatin. B.  be in interphase (G1 or S or G2). C. be in mitosis. D.  be in meiosis.

A mutation in the Ras protein could directly affect improper _____ Select one: a. cell signaling leading to alterations in cell division b. cell signaling leading to alterations proteasome activity c. microtubule assembly leading to faulty cell division d. protein degradation during the cell cycle e. protein phosphorylation in the cell cycle

interphase chromosomes are __________ while mitotic chromosomes are   a. composed of 4 DNA strands; composed of 2 DNA strand b. composed of 1 DNA Strand; composed of 2 DNA strands c.composed of 2 DNA strands; composed of 1 DNA strand d. composed of 2 DNA strands; composed of 4 DNA strands

A chromosome that has spindle fibers attached across its whole length…   a. has a localized centromere   b. is very common   c. has a holocentric centromere   d. has elevated histone content   e. has a regional centromere

The _____ is the physical location that sister chromatids are held together and where microtubules physically attach during mitosis.   a. centriole b. centrosome c. centromere d. chromatin