Biology - Genes

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Genes can have different versions. These are called...
Alleles
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Allels can be either d___ or r___
Dominant or recessive
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Aa is an example of a ___ gene
heterosygous gene
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AA is an example of a ___ ___ gene
Dominant homozygous gene allele
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aa is an example of a ___ ____ gene
Recessive homozygous allele
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Genotype is...
what gene we have
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Phenotype is...
What someone looks like
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Which allele will always be expressed in the phenotype(will impact appearance), even if there's only one(heterozgous)?
A dominant allele
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A recessive allele can also impact appearance, but only if it's...
Homozygous
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What's embyo screening?
When embryo's tested for defective(not right) allies or disorders
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List disadvantages of embryo screening
Expensive, large number of embro's are created but only a few implanted (healthy embryo's destroyed - unethical!), future possibility to screen embroy's to produce offspring with most desirable features (taking role of god- unethical)
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Cystic fibrosis is a disorder of cell ___
membranes
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This disorder occurs with the ____ ____ allele cc (c=defective cell membrane)
recessive homozgous allele
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Someone who's inherited one recessive allele and one dominant can't get cystic fibrosis, but they ara a ___ of the cystic fibrosis allele
carrier
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What percenatge of the children from parents with Cc and CC will have cystic fibrosis, be carriers, or be unaffected?
50% carriers. 50% unaffected. 0% with disorder
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Other cards in this set

Card 2

Front

Allels can be either d___ or r___

Back

Dominant or recessive

Card 3

Front

Aa is an example of a ___ gene

Back

Preview of the front of card 3

Card 4

Front

AA is an example of a ___ ___ gene

Back

Preview of the front of card 4

Card 5

Front

aa is an example of a ___ ____ gene

Back

Preview of the front of card 5
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