Module 11 Information

A cell in prophase I of meiosis has _____ as much DNA as each of the daughter cells following cytokinesis of meiosis II

four times

Homologous pairs of chromosomes separate during:

meiosis I only.

Meiosis is thought to have appeared early in evolution because most eukaryotes perform meiosis and the steps of meiosis are the same in all eukaryotes. (t or f)

true

At the start of mitosis, how many sister chromatids are present in a human cell?

46

Which of the statements is correct about cells in G1 phase in the cell cycle?

Cells in G1 phase that do not activate the enzymes associated with DNA synthesis for long periods are said to be in G0 phase.

The prokaryotic protein FtsZ is evolutionarily related to eukaryotic tubulin. What does this mean?

The amino acid sequence for FtsZ is similar to tubulin. The overall protein structure of FtsZ is similar to tubulin. The two proteins evolved from a common ancestral protein. The gene sequence for FtsZ is similar to tubulin.

During meiosis I:

sister chromatids are not separated.

The second meiotic division resembles mitosis because:

the daughter cells have the same number of chromosomes as the parent cell. sister chromatids are separated during anaphase II to become the chromosomes of the daughter cells. chromosomes decondense during telophase II. spindle microtubules attach from opposite directions to the centromere of each sister chromatid pair.

Sister chromatids are best described as two DNA molecules that have:

the same genes in the same order with the same alleles.