Member of a pair of chromosomes that are alike and come together in synapsis during prophase of the first meiotic division; a homologue.
What will be an ideal response?
homologous chromosomes (homologues)
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Inflammation is part of the __ line(s) of
defense.
a. first b. second c. third d. first and second e. second and third
An infectious agent already existing on or in the body is called ________.
A. exogenous B. axenic C. endogenous D. an exotoxin E. an enterotoxin
When pairs of homologous chromosomes separate during anaphase I
A) the maternal chromosomes all move to one daughter cell, and the paternal chromosomes all move to the other daughter cell. B) the sister chromatids remain linked to one another. C) most of the recombination has already occurred, with the remainder taking place during prophase II. D) the synaptonemal complex is visible under the light microscope
When G2 and M phase cells were fused together, the G2 nucleus became prematurely compacted when it was exposed to S phase cytoplasm in the fused cell. The G2 chromosomes could be seen to be visibly doubled. What conclusion was drawn from this result?
a) M phase cytoplasm contained diffusible factors that initiate DNA synthesis b) G2 nuclei cannot respond to diffusible factors present in M-phase cell cytoplasm c) the cytoplasm of the mitotic cell contained diffusible factors that could induct mitosis in a non-mitotic cell d) the cytoplasm of the G2 cell contained diffusible factors that could halt mitosis in a mitotic cell