B1 Revision Quiz

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What is a gene?
A gene is a code for making certain proteins
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What is a genotype?
A genotype is all the genes an organism has
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What is a phenotype?
A phenotype is all the genes an organism displays
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What is 'homozygous'?
Two alleles the same
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What is 'heterozygous'?
Two different alleles
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What sex chromosomes do women have?
**
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What sex chromosomes do men have?
XY
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What causes the development of testes?
The gene SRY causes androgens to be made which causes the development of testes
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What are the symptoms of cystic fibrosis?
Breathing difficulty, Chest Infections, Painful Coughing, Difficulty digesting food
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What are the symptoms of Huntington's Disease?
Tremors, Memory Loss, Clumsiness, Mood changes, Poor concentration
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What is a false negative?
This is when the test has failed to detect a certain allele or faulty chromosome so the person thinks that they do not have a genetic disorder when they do
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What is a false positive?
This is when a genetic test has wrongly detected a certain allele or a faulty chromosome so the person thinks that they have a genetic disorder when they don't
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What are Clones?
Clones are genetically identical organisms
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What can embryonic stem cells be used for?
replacing faulty heart muscle cells, insulin producing cells for diabetes and nerve cells fro paralysed people
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What can adult stem cells be used for?
to treat blood diseases, maintaining and repairing old, damaged tissues, leukaemia
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Other cards in this set

Card 2

Front

What is a genotype?

Back

A genotype is all the genes an organism has

Card 3

Front

What is a phenotype?

Back

Preview of the front of card 3

Card 4

Front

What is 'homozygous'?

Back

Preview of the front of card 4

Card 5

Front

What is 'heterozygous'?

Back

Preview of the front of card 5
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