Biology 1408 Chapter 9

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Crossing over occurs in ______________ of meiosis.

prophase I
During which stage of mitosis do chromosomes line up at the equator of the spindle apparatus?

metaphase
Homologous pairs of chromosomes

Consist of two chromosomes the same size and with the same genes
there are 20 centromeres in a cell, how many chromosomes are there?

20
Which of the following organisms does NOT reproduce cells by mitosis and cytokinesis?bacterium

bacterium
During anaphase of meiosis I, what separates?

homologous chromosomes
The chromosome number is reduced from diploid to haploid during

meiosis I
The longest period of a cell's life cycle is

interphase
Which of the following is haploid?

gamete
The genetic material in bacteria consists of

?