Variation and inheritance - B1h

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  • Created by: iram_f
  • Created on: 15-10-14 20:20
What are dominant and recessive alleles?
Dominant alleles control the development of a characteristic even if present on only chromosome in a homologous pair. Recessive alleles control the development of a characteristic only if a dominant allele is not present.
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What does heterozygous and homozygous mean?
Heterozygous means that your chromosomes contain different alleles of a gene for a particular gene or condition, whilst homozygous means that your chromosomes contain the same alleles of a gene for a condition.
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What are dominant and recessive alleles?
Dominant alleles control the development of a characteristic even if present in only one chromosome in a homologous pair. Recessive alleles control the development of a characteristic only if a dominant allele is not present.
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What is the cause of inherited diseases and what are some examples?
Inherited disorders, such as cystic fibrosis, sickle cell anaemia and red-green colour blindness, is often due to a faulty recessive allele. This means that the condition can only be inherited if both parents carry the recessive gene.
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What causes variation?
Genetic, environmental & a combination of features. A genetic feature is your blood group & eye colour though environmental features include language & scars. Body mass, intelligence & height are because of a combination of genetic and environm
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What causes variation?
Genetic, environmental & a combination of features. A genetic feature is your blood group & eye colour though environmental features include language & scars. Body mass, intelligence & height are because of both genetic and environmental features.
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Card 2

Front

What does heterozygous and homozygous mean?

Back

Heterozygous means that your chromosomes contain different alleles of a gene for a particular gene or condition, whilst homozygous means that your chromosomes contain the same alleles of a gene for a condition.

Card 3

Front

What are dominant and recessive alleles?

Back

Preview of the front of card 3

Card 4

Front

What is the cause of inherited diseases and what are some examples?

Back

Preview of the front of card 4

Card 5

Front

What causes variation?

Back

Preview of the front of card 5
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