Question

1.    a. chromatids in the G2 phase. – 40         or 20

chromosomes during prophase of mitosis. - 20

c.  synapsed homologous pairs in metaphase I. – 20  or 2

d.  chromatids in anaphase of mitosis. – 40  or 5

e.  telomeres in the G0 phase – 40                       or 5

not sure which of the values are right, i think im confusing it with meiosis.

2. In a diploid cell undergoing mitosis, the centromeres of the chromosomes will

a. replicate during prophase. INCORRECT – during prophase chromosomes condense. The centromeres are on the opposite site of the cell where they begin to build to mitotic spindle.

b. divide when chromosomes are synapsing. – when synapsing

c. segregate to the same pole of the cell during anaphase. CORRECT (Lewis, 2015, p.31)

d. divide in the reductional division. (Lewis, 2015, p.45)

e. attach to spindle fibres. (Lewis, 2015, p.30)

I chose C but would E be correct instead? I could only choose one option

Answer 1

2. Ans- e. attach to spindle fibers.
Explanation:
Mitosis produces two identical daughter cells. Mitosis has following phases:
Prophase –It is the 1st step of mitosis division where chromosomes become condense. Each chromosome have two identical sister chromatids that joined at the centromere. The centromere In late prophase stage, nucleus and nucleus membrane disappear and the centromere binds to the spindle fiber at the mid-cell during metaphase.
Metaphase – During this stage, the chromosomes arrange in the middle of the cell.
Anaphase – In this stage, sister chromatids separate and moves to opposite ends of the cell
Telophase – The nuclear membrane reappears and the spindle fibers disappear.
Cytokinesis – In this stage, two new cells are formed.