Question

In: Biology

if the nuclear envelope does not break down during a round of cell division it would...

if the nuclear envelope does not break down during a round of cell division it would prevent:

DNA synthesis

Migration of centrosomes to opposite poles

attachment to kinetochore microtubules to chromosome

a change in cylinder concentration during G1

all the above

During ______, Chromatids transition into chromosomes

cytokinesis

anaphase

5 phase

metaphase

A cell within a pea plant has 12 chromosomes at the end of mitotic division. How many chromosomes would there be if this cell enter G2 in a new round of the cell cycle

a. 6

b. 12

c. 24

d. 48

e. None of the above

Which of the following events occurs during interphase of the mitotic cell cycle?

a. duplication of centrosomes

b. a change in cell size

c. polymerization of microtubules associated with the mitotic spindle

d. breakdown of the nuclear envelope

e. there is more than one correct choice provided

Under normal conditions, somatic cells are always diploid and gametes are always haploid

True

False

Expert Solution

Q.1 Attchment to kinetochore microtubules to chromosomes.

Kinetochore is assembled on the surface of the chromosomes only after the nuclear envelope breaks down.

The kinetochore assembles on the centromere and join the chromosome to microtubule by the mitotic spindle.

Q.2. S phase ( Synthesis phase)

Chromosome is made up of two strands which are identical to each other called Chromatids.

DNA replication during s phase results in the formation of two identical copies of each chromosome that are attached at the centromere region.

Q3. 24.

During S phase each of the 12 chromosomes are duplicated by the cell I.e. 24 & in G2 phase Cell double checks the duplicated chromosomes for error.

Q.4.e. there is more than one correct choice.

Interphase includes G1,S G2 phase of mitosis.

Duplication of centrosome & polymerization of microtubules associated with the mitotic spindle occurs during interphase .

Q.5. True

Under normal conditions, somatic cells are always diploid meaning that they contain two sets of chromosome & gametes are always haploid.

gladiator answered 1 hour ago

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