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To minimize the occurrence of mistakes in cell-cycle events, the cell's progress through the cycle is monitored at several checkpoints

Prenatal diagnosis are the clinical tools used to determine both normal and abnormal development. There are a growing number of new diagnostic techniques that are being applied to human embryonic development.

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- There are many different ways that developmental abnormalities can occur.
- the three major types are genetic (inherited), Environmental (maternal) and Unknown (not determined) derived abnormalities.
- the environmental factors that cause or lead to any of these abnormalities are described as Teratogens.
- Congenital abnormalities are classified under the system called the International Classification of Diseases.

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Consists of two stages
1. Interphase
2. M Phase

The cell cycle is in charge of human development as it produces the needed cells.

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Many cell cycle regulator genes may be considered proto-oncogenes or tumor suppressor genes, and point mutations, amplifications, deletions, or rearrangements involving their loci, particularly those in the "RB pathway," are associated with various tumors.

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http://study.com/academy/lesson/genetic-birth-defects-risk-factors-epidemiology-and-testing.html

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-Down syndrome is a genetic disorder causing mental retardation, developmental delays and health problems. Down syndrome occurs when a person has extra genetic material on chromosome 21.

- Psoriasis is a chronic autoimmune condition in which skin cells are overproduced, resulting in raised patches of red inflamed skin, often covered in a crust of small silvery scales. If the rate of cell production exceeds that of cell loss, a build up of cells results.

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The Cell Cycle and Abnormal Human Development 

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The Cell Cycle and Abnormal Human Development 

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Abnormal human development can be caused by errors in the cell cycle.