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What would likely happen if sister chromatids separated beforekinetochore microtubules where attached to the chromosomes in ahuman skin cell? Mitosis would start over Mitotic spindle wouldcollapse Prophase would not be completed Daughter cells wouldlikely have aneuploidy Cell plate formation would be disrupted

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Lelia Lubowitz
Lelia LubowitzLv2
28 Sep 2019
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Related questions

Nonsister chromatids:

a. are attached at the centromere

b. both come from the father

c. are segregated randomly at meiosis I

d. come from both the maternal and paternal genomes

e. none of the above

(I know crossing over for nonsister chromatids occur duringmeiosis I...)


Telomeres are specialized repetative DNA sequences found at theends of chromosomes. How many telomeres are present in ahuman cell at prophase I of meiosis?

a. 23

b. 46

c. 92

d. 184

e. 368


A human cell has 23 chromosomes with 46 chromosome. In whichphase of meiosis is it?

a. telophase II

b. metaphase I

c. prophase II

d. prophase I

e. all but c


A triploid cell contains 3 sets of chromosomes. If acell of a usually diploid species with 42 chromosomes per cell istriploid, this cell would be expected to have which of thefollowing?

a. 63 chromosomes on 31 1/2 pairs

b. 63 chromosomes in 21 sets of 3

c. 63 chromosomes, each with three chromatids

d. 21 chromosome pairs and 21 unique chromosomes

(I'm leaning toward b, but I'm not sure)

Some cancer drugs such as vinblastine function by preventingformation of the mitotic spindle. The outcome is to_____________________________ of(in) cancerous cells.
A) prevent chromosomes coiling ready for duplication
B) reinstate the stop/start controls in the cell cycle
C) prevent chromosomes from producing chromatids
D) prevent homologous chromosomes lining up on the metaphaseplate
2. Most of the cell cycle is spent in ________________ during whichtime the cell grows and performs normal functions.
A) interphase
B) S phase
C) G2 phase
D) M (mitotic) phase
3. When an organism is described as “haploid” this infers that itscells
A) each contain one set of chromosomes
B) each contain half a chromosome
C) each contain two sets of chromosomes
D) each contain an “Y” chromosome
4. During _________________ of meiosis chromatids of homologouschromosomes exchange genetic material.
A) prophase II
B) anaphase I
C) prophase I
D) anaphase II
5. In a cell containing 20 chromosomes the process of meiosis willresult in ___ chromosomes in each cell.
A) 10
B) 20
C) 40
D) 30
6. Some fungi cells complete mitosis however they do not completecytokinesis. This would result in
A) large nuclei containing many chromatids
B) large cells containing lots of nuclei
C) many cells each containing one nucleus
D) daughter cells identical to the original cell
7. Which of the following statements best describes a karyotype? Apicture showing
A) most pairs of homologous chromosomes including sex chromosomestaken from a skin cell
B) pairs of homologous chromosomes taken from a sperm cell
C) all pairs of homologous chromosomes taken from a skin cell
D) pairs of homologous chromosomes taken from an egg cell
8. Which one of the following occurs during mitosis?
A) Chromosomes are duplicated
B) The cell grows
C) Organelles such as mitochondria are duplicated
D) Chromatids separate
9. The function of meiosis is to generate cells
A) that are identical to the original cell
B) to be used for asexual reproduction
C) to be used in sexual reproduction
D) to be used for tissue repair
10. The general body cells of a Koala bear contain 16 chromosomes.Completion of one cell cycle will result in ______ cell(s) (each)with _____ chromosomes.
A) one; 16
B) two; 32
C) two; 32
D) two; 16


Lab 11 Mitosis

Interphase - Chromosomes are not visible because they areuncoiled

Prophase- The chromosomes coil. The nuclear membranedisintegrates. Spindle fibers (microtubles) form. The drawing showsa cell with 8 chromosomes. Each chromosome has 2 chromatids for atotal of 16 chromatids.

Prometaphase

Metaphase - The chromosomes become aligned. The drawing shows acell with 8 chromosomes. Each chromosome has 2 chromatids for atotal of 16 chromatids.

Anaphase- The chromatids separate; the number of chromosomesdoubles. The drawing shows a cell with 16 chromosomes. Eachchromosome has 1 chromatid for a total of 16chromatids

Telophase- The cell divides into two. The chromosomes uncoil.The nucleus reforms. The spindle apparataus disassembles. Thedrawing shows a cell with 16 chromosomes. Each chromosome has 1chromatid for a total of 16 chromatids.

Ques(ons

1. What stage were most of the onion root p cells in? Does thismake sense?

2. As a cell grows, what happens to its surface area : volumerao? (Think of a balloon being blown up). How is this changing raonrelated to cell division?

3. What is the function of mitosis in a cell that is about todivide?

4. How accurate were your met predictions for each stage of thecell cycle?

5. Discuss one observation that you found interesting whilelooking at the onion root p cells.

6. What would happen if mitosis were uncontrolled?

for escience lab 11 bio 113

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