Umuc biology 102/103 lab 5: meiosis


This contains 100% rectify embodied for UMUC Biology 103 LAB05. However, this is an Apology Key, which resources, you should put it in your own words. Close is a case for the Pre lab questions apologyed:

Pre-Lab Questions

 

 

 

1. What elder events betide during interphase?

 

The cell functions at its job, and prepares for mitosis by collecting resources and duplicating organelles (G1) and genetic full (S), then creating proteins needed for nuclear disunion (G2).

 

 

 

2. A individual, residing in a residuum wclose they are unguarded to the sun repeatedly, develops a change in some of their bark cells consequenceing in cancer. Consider whether their manifestation gain be born delay the corresponding change. Use or-laws token to maintenance your apology.

 

 

 

It would be exceedingly unreasonable that the individual’s manifestation gain be born delay corresponding bark cancer change owing the change betidered in the individual’s bark cells. Bark cells are somatic cells (mass cells) and are not complicated in meiosis or plurality. For the change to be passed on to the manifestation, a sex cell (sperm or egg) would possess to push the change.

 

The other questions that gain be apologyed:

 

Experiment 1: Following Chromosomal DNA Movement through Meiosis

 

Data Tables and Post-Lab Assessment

 

Trial 1 - Meiotic Disunion Beads Diagram:

 

Prophase I

 

Metaphase I

 

Anaphase I

 

Telophase I

 

Prophase II

 

Metaphase II

 

Anaphase II

 

Telophase I

 

Cytokinesis

 

Trial 2 - Meiotic Disunion Beads Diagram:

 

Prophase I

 

Metaphase I

 

Anaphase I

 

Telophase I

 

Prophase II

 

Metaphase II

 

Anaphase II

 

Telophase I

 

Cytokinesis

 

 

 

Post-Lab Questions

 

1.    What is the ploidy of the DNA at the end of meiosis I? What environing at the end of meiosis II

2.    How are meiosis I and meiosis II irrelative?

3.    Why do you use non-sister chromatids to teach tranminority aggravate?

 

4.    What combinations of alleles could consequence from a crossaggravate between BD and bd chromosomes?

 

 5.    How sundry chromosomes were confer-upon when meiosis I afloat?

 

 6.    How sundry nuclei are confer-upon at the end of meiosis II? How sundry chromosomes are in each?

 

 7.    Identify two ways that meiosis contributes to genetic recombination.

 

8.    Why is it inevitable to diminish the sum of chromosomes in gametes, but not in other cells?

 

 9.    Blue whales possess 44 chromosomes in complete cell. Determine how sundry chromosomes you would forebode to meet in the following:

 

 

 

                                  i.    Sperm Cell:

 

 

                                 ii.    Egg Cell:

 

 

 

                                iii.    Daughter Cell from Mitosis:

 

 

 

                               iv.    Daughter Cell from Meiosis II:

 

 

 

10.  Research and meet a sickness that is caused by chromosomal changes. When does the change betide? What chromosomes are fictitious? What are the consequences?

 

 

 

 

 

 

 

11.  Diagram what would bechance if sexual plurality took settle for lewd generations using diploid (2n) cells.

 

 

Experiment 2: The Importance of Cell Cycle Control

 

Data Tables and Post-Lab Assessment

 

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Post-Lab Questions

 

1.    Record your conjecture from Step 1 in the Procedure minority close.

 

 

 

 

 

 

 

2.    What do your consequences denote environing cell cycle regulate?

 

 

 

 

 

 

 

3.    Suppose a individual patent clear a change in a somatic cell which diminishes the achievement of the mass’s spontaneous cell cycle regulate proteins. This change consequenceed in cancer, but was effectively treated delay a cocktail of cancer-fighting techniques. Is it practicable for this individual’s coming offspring to possess this cancer-causing change? Be local when you elucidate why or why not.

 

 

 

 

 

 

 

4.    Why do cells which bankruptcy cell cycle regulate evince karyotypes which observe physically irrelative than cells delay usual cell cycle.

 

 

 

 

 

 

 

5.    What are HeLa cells? Why are HeLa cells misapply for this exemplification?