Nondisjunction results when chromosomes in gametes (egg and sperm cells) do not separate properly during meiosis (cell division of gametes in 2 stages), producing gametes which have more or less than the normal number (23) of chromosomes.
Nondisjunction occurs during anaphase of either Meiosis I or Meiosis II. Anaphase is the splitting and pulling of the chromosomes, lined up at the center of the cell, to the edges or poles of the cell. Shown in the figures below are examples of when nondisjunction occurs in Meiosis I (Anaphse I) and in Meiosis II (Anaphase II).
(Figures source: http://study.com/academy/lesson/nondisjunction-in-meiosis-definition-examples-quiz.html)
Answer: Ok So A short tandem repeat is a microsatellite with repeat units that are 2 to 7 base pairs in length, with the number of repeats varying among individuals, making STRs effective for human identification purposes.STRs are extremely useful in applications such as the construction of genetic maps (49), gene location, genetic linkage analysis, identification of individuals, paternity testing, as well as disease diagnosis 50., 51.. STR analysis has also been employed in population genetics.
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Explanation:
Answer:
Nitrogen
Explanation:
Nitrogen is an important nutrient required for the proper growth and development of plants. Farmers usually plow and grow under alfalfa - a leguminous crop, to enhance the fertility of soil. This is because alfalfa adds more amount of Nitrogen in the soil than any other crop. Studies suggest that around 50 lbs. of nitrogen per acre can be added in soil each year by growing alfalfa in the crop fields. This has immense potential to overcome the problems that crops face due to lack of fertilizers.
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Human cells do not have cell walls is the statement which best describes antimicrobial drugs that affect cell wall synthesis
Explanation:
Human cell is very different from the bacteria and foreign materials which enters into the body. There are many bacteria and virus which tends to cause disease in the human body.
There are many medicines such as antibacterial, antimicrobial drugs which are helpful for dealing with these bacteria and viruses. Human cells do not have cell wall.
Some of the bacteria and virus too have cell walls. The antimicrobial and antibacterial which we take, takes action on the cell walls and try to destroy it.