B2 - Genetic Diagrams

  • Alleles
  • Genotypes
  • Monohybrid
  • Genetic disorders
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What are alleles?
Alleles are two versions of the same gene; dominant (B) and recessive (b).
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What is the structure of genetic diagrams?
Parents' genotype: BB Bb Gametes' genotype: B B B b Offspring's genotype: Bb Bb Bb Bb
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What would happen if two Bb's had offspring?
Parents' genotype: Bb Bb Gametes' genotype: B b B b Offspring's genotype: BB Bb Bb bb
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What does monohybrid mean?
When you cross two parents to look at just one characterstic.
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How is this information used today?
It is used to predict genetic disorders.
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Can we be warned about genetic disorders?
Yes, embryos can be screened for genetic disorders like cystic fibrosis and haemophilia.
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What are the ethical resons for embryo screening?
It stops suffering, there are laws to stop it going too far, IVF allows the implanted embryo to be healthy, treating disorders cost the government money.
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What are the ethical reasons against embryo screening?
Designer babies, destroyed embryos are potential life, implies people with genetic disorders are undesirable, screening is expensive.
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Other cards in this set

Card 2

Front

What is the structure of genetic diagrams?

Back

Parents' genotype: BB Bb Gametes' genotype: B B B b Offspring's genotype: Bb Bb Bb Bb

Card 3

Front

What would happen if two Bb's had offspring?

Back

Preview of the front of card 3

Card 4

Front

What does monohybrid mean?

Back

Preview of the front of card 4

Card 5

Front

How is this information used today?

Back

Preview of the front of card 5
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