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Bella S2 Cells & DNA
S2 Inheritance & DNA
|What is a gamete
|a sex cell
|Where does fertilisation take place?
|Oviduct (fallopian tube)
|What is the name of the cell formed when fertilisation takes place?
|What is the definition of fertilisation?
|When the nucleus of the sperm fuses with the nucleus of the egg (ovum)
|Why is an egg bigger than a sperm
|Cytoplasm contains a food store
|What is a gene?
|Part of a chromosome that codes for a characteristic
|What are genes and chromosomes made of?
|What parts of DNA join the two strands together?
|Why can DNA be used to identify people?
|Because everyone's DNA is different (except identical twins)
|When might you want to use DNA to identify a human?
|To prove who the parents are To identify a body part or unrecognisable body To identify a criminal
|When might you want to use DNA to identify an animal?
|To identify what meat is in your food To identify the owner of a dog that doesn't clean up after it. To match bones to species
|What are the risks of using DNA profiling to identify a human
|Mistakes can still be made by people handling evidence. DNA can easily be planted at a crime scene Families can be torn apart by paternity tests.
|From what cells can you collect DNA for profiling?
|From skin cells From sperm From saliva From blood
|How is DNA treated to perform DNA profiling
|DNA collected DNA cut into fragments by enzymes DNA fragments put into gel electrophoresis DNA gets separated into banding patterns
|What does it mean if a gene is DOMINANT
|It will always be present
|How many genes control a characteristic
|Gender, eye colour and tongue rolling are examples of what type of variation?
|Height, mass and hand span are examples of what type of variation?
|Name an example of an environmental variation
|Tatoos, Scars etc
|What are alleles?
|Different forms of a gene
|What is the name for the differences between the members of a species
|What combination of sex chromosomes do you have if you are female?
|Name a genetic disorder
|Down's syndrome Huntington#s disease Cystic Fibrosis Muscular Dystrophy
|How many elements are there in DNA?
|How many chromosomes are ther in a human sperm?
|What are the elements in DNA?
|Carbon, Hydrogen, Oxygen, Nitrogen, phosphorous
|Give an example of continuous variation
|Give an example of discrete variation
|Tongue rolling, gender, handedness Anything observable...
|What is the function of the chloroplast
|Site of photosynthesis
|What percentage chimpanzee are you?