250 -300 words total

Submission author: Alex La

Check ID: 13221541

Check date: 15.10.2019 05:55:34 GMT+0

Assignment name: Mod. 4: Reading Assessment

Check type: Doc vs Internet + Library

Submission date: 15.10.2019 05:55:13 GMT+0

Report date: 15.10.2019 06:55:48 GMT+0

User ID: 568589

File name: reading assessment

File ID: 17450387 Page count: 2 Word count: 358 Сharacter count: 2314 File size: 26.00 KB

70.9% Matches Highest match: 70.9% with library source. File ID: 17392289

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Biology

Meiosis is the mechanism by which a single cell splits divides two times generating four

cells having half the initial genetic material. Disorders of the chromosomes can be categorised

into two: chromosomal structural rearrangements and abnormalities in the number of

chromosomes. Characteristically, chromosomal disorders are dramatic and fatal because they can

span many genes. The most common error during meiosis is non-disjunction. Non-disjunction

results when chromosomes fail to separate during cell division properly. The consequences are

gametes having the wrong number of chromosomes. Autosomal non-disjunction is fatal, and the

pregnancy is not carried out. In the event autosomal non-disjunctions lead to birth, the baby will

carry a third chromosome. An example of such autosomal non-disjunction disorder is Turner

syndrome, whereby monosomy occurs leading complete absence of a chromosome. Turner

syndrome requires medical diagnosis and is characterised by short stature, puberty delayed, heart

defects and some learning incapacities. Treatment, involves home therapy and fertility treatment

for women who wish to get pregnant. However, Turner syndrome is incurable.

DNA replication ensures that when a cell divides, each daughter cell acquires a similar

copy of the DNA. DNA replication takes place during the synthesis phase (S phase) before

meiosis and mitosis occur. DNA replication is a complex issue to understand; however, the video

in the link attached below offers a simple and clear way to understand DNA replication. In the

video, the clarification of the double helix structure of the DNA provides a hint on DNA is

copied. The video shows the pairing adenine and thymine nucleotides and cytosine with guanine

hence showing how the two strands are complementary to each other. Both of the strands that

comprise of the double helix act as a template for synthesis of new identical strands. The

replication factor that still seems challenging to comprehend is the binding of the primer to the 3’

end of the strand.

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BIOLOGY 2

Reference

Bartee, L. (2017). Meiosis I. Principles of Biology: Biology 211, 212, and 213.

Fragkos, M., Ganier, O., Coulombe, P., & Méchali, M. (2015). DNA replication origin activation

in space and time. Nature Reviews Molecular Cell Biology, 16(6), 360.

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3 https://www.paperdue.com/topic/tissue-engineering-essays 2.5%

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1 Student submission File ID: 17392289 Institution: San Diego Community College District 70.9%

11 Sources

File name: reading assessment File ID: 17450387

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Quotes References 1

1 Bartee, L. (2017). Meiosis I. Principles of Biology: Biology 211, 212, and 213. Fragkos, M., Ganier, O., Coulombe, P., & Méchali, M. (2015). DNA replication origin activation in space and time. Nature Reviews Molecular Cell Biology, 16(6), 360.

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