Genetic screening is the study of someone's DNA, it shows if someone has a gentic disorder. It can show if adults carry genes for a genitic disorder, if they have the genetic disorder. It can also show, If embryos or fetus's have inherited a disea
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Give a disadvantage(s) of genetic screening.
- Expensive - False results, not 100% accurate - Someone could make a decision based on an inaccurate result (abortion) - It is viewed as unethical - Children are often aborted after result - Not accessible to everyone - Can cause miscarriges
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DNA fingerprinting, what to remember
- If the bars are exacly the same, it is the same person. - If half the bars are the same, it is a parent. - If a lot of the bars are the same, it is a close realtive, probably a sibling.
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What is a gene?
section of DNA. A gene codes protein, specifying the order of amino acids.
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What are chromosomes?
These are made from DNA, the cell nucleus contain them
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What is DNA?
Deoxyribose nucleic acid. They carry genetic codes, which determine charcteristics.
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Where are DNA, chromosomes and nuceli found?
Nuceli are in a cell. A nucleus contains chromosomes. Chromosomes contain genes.
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What is a genotype?
Allelles we have for a gene
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What is a phenotype?
Observable charcteristics (genes/ enviroment)
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What is an allele?
Different versions of a gene.
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What is meant by hetrozygous?
Having two different allelles of a gene.
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What is meant by homozygous?
Having two of the same allelles of a gene.
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What is a haploid cell?
Haploid cells Single set (23) chromosomes Sex cells (sperm, egg) Made in the overies and testies Gametes
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What is a diploid cell?
Diploid cell A diploid cell has a full set (46) chromosomes Daughter cells Body cells: Nerve, muscle
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What is meosis?
Cell division, produces 4 gamete cells. Each cell is different These are sex cells, used in fetilisation. Sex cells include the sperm and egg, which are made in testies and overies. Haploid cells (23)
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What is mitosis?
Cell division 2 daughter cells produced Cells are identical For growth and repair Diploid cells (23) body cells: nerve and muscle
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Stem cells
STEM CELLS are undifferented cells, meaning they are capable of becoming another cell, and having another function.
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Where are stem cells found, why are stem cells use
Stem cells are found in the brain of born humans. They are also found in cells of emobryos. Stem cells found in embryos are more useful, as they are capable of becoming more. Stem cells could save lives, they can grow new organs.
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Give advantages and disadvantages of using embryo stem cell
A- They can save lives. A- They can improve lives. A- They can cure people of disease. D- Viewed as unethical. D- Against religious beliefs. D- Embryos are still a life. A- Embryos that will be discarded after IVF can be used, embryos that would be d
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What is meant by differation?
cell becoming specialised to do a certain job.
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Other cards in this set
Card 2
Front
Give a disadvantage(s) of genetic screening.
Back
- Expensive - False results, not 100% accurate - Someone could make a decision based on an inaccurate result (abortion) - It is viewed as unethical - Children are often aborted after result - Not accessible to everyone - Can cause miscarriges
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